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.

A121398 Main diagonal of triangle A121400; also equals the partial sums of column 0 (A121399) of the same triangle.

Table of values

n a(n)
0 1
1 2
2 5
3 11
4 28
5 70
6 184
7 486
8 1313
9 3576
10 9851
11 27319
12 76286
13 214120
14 603858
15 1709719
16 4857959
17 13845948
18 39572583
19 113380652
20 325576692
21 936796592
22 2700456452
23 7797587816
24 22550434989
25 65308288346
26 189388557677

List of values

[1, 2, 5, 11, 28, 70, 184, 486, 1313, 3576, 9851, 27319, 76286, 214120, 603858, 1709719, 4857959, 13845948, 39572583, 113380652, 325576692, 936796592, 2700456452, 7797587816, 22550434989, 65308288346, 189388557677]

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

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