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.

A307906 Coefficient of x^n in 1/(n+1) * (1 + x + n*x^2)^(n+1).

Table of values

n a(n)
0 1
1 1
2 3
3 10
4 57
5 301
6 2251
7 15583
8 138209
9 1153603
10 11592451
11 111381348
12 1235739385
13 13276480803
14 159935056555
15 1884023828326
16 24356065951617
17 310189106485419
18 4266048524240323
19 58124516559463590
20 844705360693479801
21 12213285476055278959
22 186543178982826381387

List of values

[1, 1, 3, 10, 57, 301, 2251, 15583, 138209, 1153603, 11592451, 111381348, 1235739385, 13276480803, 159935056555, 1884023828326, 24356065951617, 310189106485419, 4266048524240323, 58124516559463590, 844705360693479801, 12213285476055278959, 186543178982826381387]

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

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