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.

A103287 Main diagonal of triangle A103286, in which row n+1 is formed by sorting, in ascending order, the result of the convolution of row n with {2,1}.

Table of values

n a(n)
0 1
1 2
2 5
3 12
4 30
5 77
6 202
7 540
8 1464
9 4014
10 11101
11 30910
12 86542
13 243416
14 687364
15 1947736
16 5536216
17 15779646
18 45088304
19 129124925
20 370550378
21 1065368994
22 3068348448
23 8851297414
24 25571726480
25 73981434516
26 214317561452

List of values

[1, 2, 5, 12, 30, 77, 202, 540, 1464, 4014, 11101, 30910, 86542, 243416, 687364, 1947736, 5536216, 15779646, 45088304, 129124925, 370550378, 1065368994, 3068348448, 8851297414, 25571726480, 73981434516, 214317561452]

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

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