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The aliquot sequence for a number is a sequence of positive integers in which each term is the sum of the proper divisors of the previous term.

The number 276 is the smallest integer which the complete aliquot sequence is unknown. Here is a list of the first part in the sequence:

 0:  276
 1:  396
 2:  696
 3:  1104
 4:  1872
 5:  3770
 6:  3790
 7:  3050
 8:  2716
 9:  2772
 10: 5964
 11: 10164
 12: 19628
 13: 19684
 14: 22876
 15: 26404
 16: 30044
 17: 33796
 18: 38780
 19: 54628
 20: 54684
 21: 111300
 22: 263676
 23: 465668
 24: 465724
 25: 465780
 26: 1026060
 27: 2325540
 28: 5335260
 29: 11738916
 30: 23117724
 31: 45956820
 32: 121129260
 33: 266485716
 34: 558454764
 35: 1092873236
 36: 1470806764
 37: 1471882804
 38: 1642613196
 39: 2737688884
 40: 2740114636
 41: 2791337780
 42: 4946860492
 43: 4946860548
 44: 9344070652
 45: 9344070708
 46: 15573451404
 47: 27078171764
 48: 27284104204
 49: 27410152084
 50: 27410152140
 51: 76787720100
 52: 220578719452
 53: 254903331620
 54: 361672366300
 55: 603062136740
 56: 921203207260
 57: 1381419996068
 58: 1395444575644
 59: 1395478688996
 60: 1395546402460
 61: 2069258468900
 62: 3065057872156
 63: 3277068463844
 64: 3429776547484
 65: 3597527970596
 66: 4028517592540
 67: 5641400009252
 68: 5641400009308
 69: 5641400009364
 70: 9709348326636
 71: 16331909651988
 72: 31948891146732
 73: 54770416120644
 74: 100509779504316
 75: 208751080955844
 76: 388416032284476
 77: 749365894850244
 78: 1414070378301756
 79: 2556878765995204
 80: 2556878765995260
 81: 6726041614128900
 82: 15626498692840700
 83: 23762659088671300
 84: 35168735451235260
 85: 78257359358590020
 86: 186897487211247036
 87: 340813223900632644
 88: 592585414385033916
 89: 1326583294186844484
 90: 2594892903616159356
 91: 4946738730471899844
 92: 8244565422068579772