The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A028626 Expansion of (theta_3(z)*theta_3(15z) + theta_2(z)*theta_2(15z))^2. 3
 1, 4, 4, 0, 12, 24, 8, 16, 36, 4, 64, 16, 16, 24, 48, 20, 60, 40, 4, 48, 152, 16, 80, 48, 24, 124, 88, 0, 112, 56, 68, 64, 116, 32, 104, 176, 12, 56, 112, 32, 336, 104, 48, 96, 176, 24, 144, 112, 64, 100, 364, 32, 200, 88, 8, 256, 240, 32, 184, 112, 156, 120, 192 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS Jinyuan Wang, Table of n, a(n) for n = 0..1000 PROG (PARI) a(n) = if( n<0, 0, polcoeff( (1 + 2 * x * Ser(qfrep( [ 2, 1; 1, 8], n, 1)))^2, n)); \\ Jinyuan Wang, Feb 19 2020 CROSSREFS Sequence in context: A021698 A199739 A121547 * A205507 A137862 A006805 Adjacent sequences:  A028623 A028624 A028625 * A028627 A028628 A028629 KEYWORD nonn AUTHOR EXTENSIONS More terms from Jinyuan Wang, Feb 19 2020 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 September 30 18:12 EDT 2020. Contains 337440 sequences. (Running on oeis4.)