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.

A006363 Number of antichains (or order ideals) in the poset B_4 X [n]; or size of the distributive lattice J(B_4 X [n]).

Table of values

n a(n)
0 1
1 168
2 7581
3 160948
4 2068224
5 18561984
6 127234008
7 706987164
8 3320153661
9 13583619496
10 49530070161
11 163806121656
12 498180781144
13 1408758106368
14 3737505070344
15 9372218674824
16 22351423903953
17 50960797533096
18 111574385244253
19 235475590500876
20 480631725411720
21 951504952784320
22 1831615165328400
23 3435931869872580

List of values

[1, 168, 7581, 160948, 2068224, 18561984, 127234008, 706987164, 3320153661, 13583619496, 49530070161, 163806121656, 498180781144, 1408758106368, 3737505070344, 9372218674824, 22351423903953, 50960797533096, 111574385244253, 235475590500876, 480631725411720, 951504952784320, 1831615165328400, 3435931869872580]

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

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