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.

A345078 a(0) = 1; a(n) = 7 * Sum_{k=1..n} binomial(n,k) * a(k-1).

Table of values

n a(n)
0 1
1 7
2 63
3 609
4 6349
5 70693
6 835051
7 10408335
8 136290371
9 1867933865
10 26712000161
11 397487932457
12 6140285212915
13 98264596199651
14 1626101133819855
15 27779382241071769
16 489188555650420493
17 8867962363328434205
18 165284825277198034611
19 3163858565498874214559
20 62133992974174011252635

List of values

[1, 7, 63, 609, 6349, 70693, 835051, 10408335, 136290371, 1867933865, 26712000161, 397487932457, 6140285212915, 98264596199651, 1626101133819855, 27779382241071769, 489188555650420493, 8867962363328434205, 165284825277198034611, 3163858565498874214559, 62133992974174011252635]

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

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