The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A028642 Expansion of (theta_3(z)*theta_3(19z) + theta_2(z)*theta_2(19z))^2. 3
 1, 4, 4, 0, 4, 16, 16, 8, 20, 20, 24, 24, 48, 8, 32, 16, 52, 16, 52, 4, 40, 48, 48, 32, 80, 52, 56, 64, 80, 56, 96, 32, 84, 48, 72, 56, 116, 56, 4, 96, 120, 40, 128, 56, 96, 112, 96, 56, 144, 60, 124, 112, 152, 104, 160, 120, 160, 0, 120, 64, 256, 80, 128, 136 (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, 10], n, 1)))^2, n)); \\ Jinyuan Wang, Feb 19 2020 CROSSREFS Cf. A028643, A028644. Sequence in context: A169784 A236929 A351521 * A159796 A069523 A021231 Adjacent sequences:  A028639 A028640 A028641 * A028643 A028644 A028645 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 | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified May 21 09:30 EDT 2022. Contains 353908 sequences. (Running on oeis4.)