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.

A239108 Number of hybrid 5-ary trees with n internal nodes.

Table of values

n a(n)
0 1
1 2
2 19
3 253
4 3920
5 66221
6 1183077
7 21981764
8 420449439
9 8223704755
10 163727846678
11 3307039145618
12 67600147666909
13 1395822347989531
14 29070233296701815
15 609950649080323320
16 12881240945694949696
17 273590092192962485985
18 5840400740191969187922

List of values

[1, 2, 19, 253, 3920, 66221, 1183077, 21981764, 420449439, 8223704755, 163727846678, 3307039145618, 67600147666909, 1395822347989531, 29070233296701815, 609950649080323320, 12881240945694949696, 273590092192962485985, 5840400740191969187922]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement.