A111581 G.f.: A(x) = ( G(x)^2 - G(x^2) - 2*x/(1-x^2) )/(4*x^2) where G(x) is the g.f. of A110627.

1, 1, 2, 2, 3, 3, 4, 5, 6, 7, 8, 8, 9, 9, 10, 10, 11, 12, 12, 14, 14, 15, 16, 16, 17, 17, 18, 19, 19, 21, 20, 21, 22, 22, 24, 24, 25, 26, 27, 29, 29, 31, 32, 32, 34, 34, 35, 36, 37, 38, 39, 40, 41, 42, 44, 44, 45, 46, 47, 48, 49, 49, 50, 50, 51, 51, 52, 53, 53, 55, 55, 56, 57, 57

Offset: 0

Author

Paul D. Hanna, Aug 28 2005

Keywords

• nonn

Comments

A110627 is the bisection of A083952; surprisingly, the self-convolution of A110627 is congruent modulo 4 to A083952, which consists entirely of 1's and 2's.

Crossrefs

Cf. A110627, A083952.