A238896 Number of times that the number A238895(n) occurs in the sum of proper divisors function (A001065).

0, 1, 2, 3, 5, 6, 8, 9, 10, 13, 15, 20, 21, 24, 25, 27, 32, 34, 41, 44, 46, 56, 59, 70, 74, 76, 86, 92, 99, 115, 116, 129, 138, 145, 156, 164, 169, 171, 193, 199, 222, 223, 242, 246, 268, 270, 278, 295, 304, 334, 343, 365, 397, 398, 433, 452, 471, 482, 521

Offset: 1

Author

T. D. Noe, Mar 10 2014

Keywords

• nonn

Links

• Amiram Eldar, Table of n, a(n) for n = 1..245

Crossrefs

Cf. A001065, A005114, A048138, A238895.

Programs

Mathematica

nn = 1000; s = Table[0, {nn}]; Do[k = DivisorSigma[1, n] - n; If[0 < k <= nn, s[[k]]++], {n, nn^2}]; mx = -1; t = {}; Do[If[s[[n]] > mx, mx = s[[n]]; AppendTo[t, {n, mx}]], {n, 2, nn}]; Transpose[t][[2]]

Formula

a(n) = A048138(A238895(n)). - Amiram Eldar, Sep 23 2022