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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.

A293951 Number of linear extensions of a poset whose Hasse diagram consists of n binary shrubs with type B_n joins.

Table of values

n a(n)
0 1
1 9
2 477
3 74601
4 25740261
5 16591655817
6 17929265150637
7 30098784753112329
8 74180579084559895221
9 256937013876000351610089
10 1208025937371403268201735037
11 7494692521096248546330688437801
12 59931935202159196095445595508666501

List of values

[1, 9, 477, 74601, 25740261, 16591655817, 17929265150637, 30098784753112329, 74180579084559895221, 256937013876000351610089, 1208025937371403268201735037, 7494692521096248546330688437801, 59931935202159196095445595508666501]

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

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