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.

A387311 a(n) = Sum_{k=0..n} 3^k * binomial(n+3,k+3) * binomial(2*k+6,k+6).

Table of values

n a(n)
0 1
1 28
2 535
3 8750
4 132041
5 1900808
6 26557986
7 363716220
8 4912064355
9 65673861484
10 871539802276
11 11501122783696
12 151118588963615
13 1978948331160080
14 25846338449608184
15 336857447941007280
16 4382848524348689883
17 56947000383926523780
18 739095412895790074215
19 9583718189242229830798

List of values

[1, 28, 535, 8750, 132041, 1900808, 26557986, 363716220, 4912064355, 65673861484, 871539802276, 11501122783696, 151118588963615, 1978948331160080, 25846338449608184, 336857447941007280, 4382848524348689883, 56947000383926523780, 739095412895790074215, 9583718189242229830798]

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

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