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.

A121673 a(n) = [x^n] (1 + x*(1+x)^(n-1) )^n.

Table of values

n a(n)
0 1
1 1
2 3
3 16
4 131
5 1306
6 15257
7 203967
8 3047907
9 50115310
10 896746169
11 17308420306
12 357767229778
13 7872926416538
14 183537476164902
15 4513828442107368
16 116688468769638435
17 3160881019508153238
18 89471871451166037425

List of values

[1, 1, 3, 16, 131, 1306, 15257, 203967, 3047907, 50115310, 896746169, 17308420306, 357767229778, 7872926416538, 183537476164902, 4513828442107368, 116688468769638435, 3160881019508153238, 89471871451166037425]

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

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