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.

A056937 Number of antichains (or order ideals) in the poset 3*3*3*n or size of the distributive lattice J(3*3*3*n).

Table of values

n a(n)
0 1
1 980
2 211250
3 17792748
4 781429368
5 21238316210
6 398925639186
7 5585711269074
8 61555624183223
9 555895303974238
10 4242859829536322
11 28038281717424550
12 163544036697306396
13 855242362045150398

List of values

[1, 980, 211250, 17792748, 781429368, 21238316210, 398925639186, 5585711269074, 61555624183223, 555895303974238, 4242859829536322, 28038281717424550, 163544036697306396, 855242362045150398]

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

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