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.

A203974 Number of nX7 0..2 arrays with every 1 immediately preceded by 0 to the left or above, and every 2 immediately preceded by 0 1 to the left or above.

Table of values

n a(n)
1 44
2 5569
3 1107082
4 180623180
5 30104480870
6 5061444598545
7 847220834970347
8 141937054743243405
9 23779975312437117115
10 3983658769957290205062
11 667379066179974381638813
12 111804522576410924713391638

List of values

[44, 5569, 1107082, 180623180, 30104480870, 5061444598545, 847220834970347, 141937054743243405, 23779975312437117115, 3983658769957290205062, 667379066179974381638813, 111804522576410924713391638]

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

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