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.

A212851 Number of n X 4 arrays with rows being permutations of 0..3 and no column j greater than column j-1 in all rows.

Table of values

n a(n)
1 1
2 211
3 8983
4 271375
5 7225951
6 182199871
7 4479288703
8 108787179775
9 2626338801151
10 63217691436031
11 1519452489242623
12 36493601345048575
13 876167372044132351
14 21031868446675976191
15 504811062363654815743
16 12116020140998121291775
17 290791139166323355287551

List of values

[1, 211, 8983, 271375, 7225951, 182199871, 4479288703, 108787179775, 2626338801151, 63217691436031, 1519452489242623, 36493601345048575, 876167372044132351, 21031868446675976191, 504811062363654815743, 12116020140998121291775, 290791139166323355287551]

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

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