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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.

A212854 Number of n X 7 arrays with rows being permutations of 0..6 and no column j greater than column j-1 in all rows.

Table of values

n a(n)
1 1
2 3081513
3 53090086057
4 429966316953825
5 2675558106868421881
6 14895038886845467640193
7 78785944892341703819175577
8 406643086764765052892275303425
9 2073826171428339544452057104498041

List of values

[1, 3081513, 53090086057, 429966316953825, 2675558106868421881, 14895038886845467640193, 78785944892341703819175577, 406643086764765052892275303425, 2073826171428339544452057104498041]

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

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