A171511 Numbers that are not the sum of the k-th composite number and k for any k >= 1.

1, 2, 3, 4, 6, 7, 9, 10, 12, 14, 16, 17, 19, 20, 22, 24, 26, 27, 29, 30, 32, 34, 36, 37, 39, 41, 43, 45, 47, 48, 50, 51, 53, 55, 57, 59, 61, 62, 64, 66, 68, 69, 71, 72, 74, 76, 78, 79, 81, 83

Offset

1,2

Links

Robert Israel, Table of n, a(n) for n = 1..10000

Maple

Comps:= remove(isprime, [$4..200]):
A:= {seq(Comps[i]+i, i=1..nops(Comps))}:
sort(convert({$1..max(A)} minus A, list)); # Robert Israel, Mar 23 2020

Crossrefs

Complement of A161537.

Sequence in context: A211264 A189725 A248635 * A225819 A205805 A246372

Adjacent sequences: A171508 A171509 A171510 * A171512 A171513 A171514

Keyword

nonn

Author

Jaroslav Krizek, Dec 10 2009

Status

approved