A131752 Number of ways of choosing the largest subset of {1,2,...,n} such that no two distinct elements differ by a perfect square.

1, 2, 4, 7, 10, 16, 24, 36, 56, 76, 112, 160

Offset

1,2

Links

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

Crossrefs

Cf. A100719, A131753, A131754.

Sequence in context: A000375 A244488 A365068 * A062365 A049630 A032705

Adjacent sequences: A131749 A131750 A131751 * A131753 A131754 A131755

Keyword

nonn

Author

Olivier Gérard, Sep 17 2007

Status

approved