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A167211 Numbers n such that number of perfect partitions of n-1 divides n. 1
1, 2, 3, 4, 5, 6, 7, 8, 11, 13, 15, 16, 17, 19, 21, 23, 29, 31, 32, 33, 37, 39, 40, 41, 43, 47, 48, 51, 53, 57, 59, 61, 64, 67, 69, 71, 73, 78, 79, 83, 87, 89, 93, 97, 101, 103, 107, 109, 111, 113, 123, 127, 128, 129, 130, 131, 132, 137, 139, 141, 149, 151, 157 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Amiram Eldar, Table of n, a(n) for n = 1..10000

FORMULA

{n: A002033(n-1) | n}.

MATHEMATICA

f[1] = 1; f[n_] := f[n] = DivisorSum[n, f[#] &, # < n &]; Select[Range[100], Divisible[#, f[#]] &] (* Amiram Eldar, Dec 30 2019 *)

CROSSREFS

Cf. A002033, A007694, A033950.

Sequence in context: A093515 A249724 A084369 * A067133 A192588 A258946

Adjacent sequences:  A167208 A167209 A167210 * A167212 A167213 A167214

KEYWORD

nonn

AUTHOR

Juri-Stepan Gerasimov, Oct 30 2009

EXTENSIONS

Definition corrected by R. J. Mathar, May 21 2010

More terms from Amiram Eldar, Dec 30 2019

STATUS

approved

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Last modified July 12 16:03 EDT 2020. Contains 335665 sequences. (Running on oeis4.)