A131753 Number of ways of choosing the largest subset of {1,2,...,n} such that no two distinct elements differ by a perfect square > 1.

1, 3, 7, 15, 23, 35, 53, 80, 134, 188, 266, 376

Offset

1,2

Links

Table of n, a(n) for n=1..12.

Crossrefs

Cf. A100719, A131752, A131754.

Sequence in context: A349743 A141354 A181106 * A330319 A171503 A326354

Adjacent sequences: A131750 A131751 A131752 * A131754 A131755 A131756

Keyword

nonn

Author

Olivier Gérard, Sep 17 2007

Status

approved