A248807 Range of A037214 = coefficients of (sum_{n>0} n*X^(n^2))^2.

0, 1, 4, 6, 8, 9, 10, 12, 16, 18, 20, 22, 24, 28, 30, 32, 36, 38, 39, 40, 42, 48, 49, 50, 52, 54, 58, 60, 64, 68, 70, 72, 78, 80, 81, 88, 90, 96, 98, 102, 108, 110, 112, 118, 120, 121, 122, 128

Offset: 1

Author

M. F. Hasler, Oct 14 2014

Keywords

• nonn

Comments

Also: Numbers of the form sum(xy ; x,y>0 and x^2+y^2=n) for some fixed n.

Crossrefs

Cf. A037214.