A170974 Expansion of Product_{i=0..m-1} (1 + x^(4*i+1)) for m = 11.

1, 1, 0, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 2, 1, 0, 1, 2, 1, 0, 1, 3, 2, 0, 1, 3, 3, 1, 1, 4, 4, 1, 1, 4, 5, 2, 1, 5, 7, 3, 1, 5, 8, 5, 1, 5, 10, 6, 1, 4, 11, 9, 2, 4, 12, 11, 3, 3, 12, 14, 5, 3, 13, 16, 7, 3, 12, 19, 10, 3, 12, 20, 12, 3, 11, 23, 16, 4, 10, 23, 19, 5, 8, 24, 23, 7, 7, 23, 25, 10, 6, 23

Offset: 0

Author

N. J. A. Sloane, Aug 29 2010

Keywords

• nonn
• fini
• full
• easy

Links

• Nathaniel Johnston, Table of n, a(n) for n = 0..231 (full sequence)

Crossrefs

Cf. A169975, A170966-A170984.

Programs

Mathematica

CoefficientList[Series[Product[1+x^(4i+1),{i,0,10}],{x,0,100}],x] (* Harvey P. Dale, Apr 27 2025 *)

Formula

a(n) = a(231-n). - Rick L. Shepherd, Mar 01 2013