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 A063938 Numbers n such that n divides tau(n), where tau(n)=A000594(n) is Ramanujan's tau function. 16
 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 25, 27, 28, 30, 32, 35, 36, 40, 42, 45, 48, 49, 50, 54, 56, 60, 63, 64, 70, 72, 75, 80, 81, 84, 88, 90, 91, 92, 96, 98, 100, 105, 108, 112, 115, 120, 125, 126, 128, 135, 140, 144, 147, 150, 160, 161, 162, 168 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Although most small numbers are in the sequence, it becomes sparser for larger values; e.g., only 504 numbers up to 10000 and only 184 numbers from 10001 to 20000 are in the sequence. LINKS Seiichi Manyama, Table of n, a(n) for n = 1..10000 Eric Weisstein's World of Mathematics, Tau Function. MATHEMATICA (* First do <

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Last modified December 15 14:02 EST 2018. Contains 318149 sequences. (Running on oeis4.)