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.

A136223 Column 2 of triangle A136220; also equals column 0 of U^3 = A136236 where U = A136228.

Table of values

n a(n)
0 1
1 3
2 21
3 208
4 2637
5 40731
6 742620
7 15624420
8 372892266
9 9959561867
10 294465305959
11 9551090908795
12 337297690543923
13 12886076807637021
14 529624555043780909
15 23305654066781507361
16 1093356525580359412557

List of values

[1, 3, 21, 208, 2637, 40731, 742620, 15624420, 372892266, 9959561867, 294465305959, 9551090908795, 337297690543923, 12886076807637021, 529624555043780909, 23305654066781507361, 1093356525580359412557]

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

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