This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A286813 Number of positive odd solutions to equation x^2 + 8*y^2 = 8*n + 9. 1
 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 1, 1, 0, 0, 1, 1, 0, 0, 1, 0, 0, 1, 0, 1, 1, 1, 0, 1, 1, 1, 1, 0, 0, 0, 1, 0, 2, 0, 0, 1, 0, 0, 0, 0, 1, 2, 0, 0, 1, 1, 0, 1, 1, 1, 1, 1, 0, 0, 1, 0, 1, 0, 0, 2, 0, 0, 1, 0, 0, 2, 0, 0, 0, 0, 1, 0, 1, 0, 1, 1, 1, 1, 0, 1, 1, 0, 2, 0 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,37 LINKS Seiichi Manyama, Table of n, a(n) for n = 0..10000 Simon Plouffe, Conjectures of the OEIS, as of June 20, 2018. FORMULA Expansion of q^(-9/8) * (eta(q^2) * eta(q^16))^2 / (eta(q) * eta(q^8)) in powers of q. Euler Transform of : -(-2*x^8-x^7-1)/(x^9+x^8+x+1) (ogf), Simon Plouffe,June 23 2018. CROSSREFS Related to the number of positive odd solutions to equation x^2 + k*y^2 = 8*n + k + 1: A008441 (k=1), A033761 (k=2), A033762 (k=3), A053692 (k=4), A033764 (k=5), A259896 (k=6), A035162 (k=7), this sequence (k=8). Sequence in context: A178602 A216279 A025441 * A176891 A219486 A284574 Adjacent sequences:  A286810 A286811 A286812 * A286814 A286815 A286816 KEYWORD nonn AUTHOR Seiichi Manyama, May 28 2017 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified May 22 14:32 EDT 2019. Contains 323480 sequences. (Running on oeis4.)