cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A245754 Number of identity trees with n nodes where the maximal outdegree (branching factor) equals 9.

Original entry on oeis.org

6, 63, 400, 2003, 8749, 34754, 128907, 453653, 1531833, 5001990, 15888511, 49313315, 150075356, 449080945, 1324309374, 3855721297, 11100436053, 31641094693, 89395066791, 250570651706, 697347017396, 1928281739720, 5300986280922, 14495618055341, 39446850848309
Offset: 36

Views

Author

Joerg Arndt and Alois P. Heinz, Jul 31 2014

Keywords

Crossrefs

Column k=9 of A244523.

Programs

  • Maple
    b:= proc(n, i, t, k) option remember; `if`(n=0, 1,
          `if`(i<1, 0, add(binomial(b(i-1$2, k$2), j)*
           b(n-i*j, i-1, t-j, k), j=0..min(t, n/i))))
        end:
    a:= n-> b(n-1$2, 9$2) -b(n-1$2, 8$2):
    seq(a(n), n=36..70);