1,2

Subsequence of A176552, A175352 and A176587. See A174894.

Complement of A175418. [From Jaroslav Krizek, May 09 2010]

Table of n, a(n) for n=1..36.

For a(13) = 36: 36 = 2^2*3^3; both (2+2+3+3)/4 and (2+3)/2 are not integers.

Sequence in context: A114989 A334166 A175352 * A129493 A036350 A295076

Adjacent sequences: A175394 A175395 A175396 * A175398 A175399 A175400

nonn

Jaroslav Krizek, May 01 2010

approved