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.

A324070 Number of defective (binary) heaps on n elements where nine ancestor-successor pairs do not have the correct order.

Table of values

n a(n)
0 0
1 0
2 0
3 0
4 0
5 0
6 0
7 240
8 4200
9 39424
10 359520
11 3340800
12 32630400
13 331499520
14 3503385600
15 38504294400
16 386486100000
17 4064835174400
18 44847772569600
19 530121646080000
20 6258102529536000
21 78618109870080000
22 1027628834918400000
23 14504975258222592000

List of values

[0, 0, 0, 0, 0, 0, 0, 240, 4200, 39424, 359520, 3340800, 32630400, 331499520, 3503385600, 38504294400, 386486100000, 4064835174400, 44847772569600, 530121646080000, 6258102529536000, 78618109870080000, 1027628834918400000, 14504975258222592000]

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

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