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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.

A215826 Number of ways in which a 9 X n grid can be tiled with trominoes.

Table of values

n a(n)
0 1
1 1
2 41
3 3127
4 41813
5 1269900
6 45832761
7 1064557805
8 30860212081
9 928789262080
10 25020222581494
11 714819627084057
12 20574308184277971
13 576115800837801057
14 16381774291037991059
15 466431115279461257920
16 13190758349044182698371
17 374524994697062170913555

List of values

[1, 1, 41, 3127, 41813, 1269900, 45832761, 1064557805, 30860212081, 928789262080, 25020222581494, 714819627084057, 20574308184277971, 576115800837801057, 16381774291037991059, 466431115279461257920, 13190758349044182698371, 374524994697062170913555]

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

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