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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.

A274644 Number of linear extensions of the one-level grid poset G[(1^n), (0^(n-1)), (0^(n-1))].

Table of values

n a(n)
1 1
2 6
3 71
4 1266
5 30206
6 902796
7 32420011
8 1359292626
9 65164480466
10 3515569641156
11 210779736073446
12 13903319821066836
13 1000559812125494076
14 78012524487061315416
15 6550837823204594551731
16 589404446176366002280146
17 56568586570039148217467786
18 5768723174387469795772704276
19 622900652040379217092492454866

List of values

[1, 6, 71, 1266, 30206, 902796, 32420011, 1359292626, 65164480466, 3515569641156, 210779736073446, 13903319821066836, 1000559812125494076, 78012524487061315416, 6550837823204594551731, 589404446176366002280146, 56568586570039148217467786, 5768723174387469795772704276, 622900652040379217092492454866]

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

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