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.

A247738 Total number of N shapes in all tilings of a 5 X n rectangle with pentominoes of any shape.

Table of values

n a(n)
0 0
1 0
2 0
3 8
4 88
5 1024
6 10388
7 99840
8 935900
9 8415368
10 74295280
11 645535244
12 5545784444
13 47152918764
14 397457338488
15 3327197881716
16 27688757985292
17 229256300558340
18 1889667799688076
19 15514699106805468
20 126939424800685264
21 1035396864840877088
22 8421920979218715332

List of values

[0, 0, 0, 8, 88, 1024, 10388, 99840, 935900, 8415368, 74295280, 645535244, 5545784444, 47152918764, 397457338488, 3327197881716, 27688757985292, 229256300558340, 1889667799688076, 15514699106805468, 126939424800685264, 1035396864840877088, 8421920979218715332]

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

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