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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.

A354012 Number of tilings of a 4 X n rectangle using 2 X 2 tiles, right trominoes and dominoes.

Table of values

n a(n)
0 1
1 1
2 17
3 81
4 702
5 4623
6 35044
7 248045
8 1819731
9 13110984
10 95362462
11 690253391
12 5008926698
13 36300216768
14 263252448712
15 1908449014617
16 13837881924141
17 100326715619679
18 727420462629671
19 5274035027493046
20 38238994112367061
21 277246970248002472
22 2010151423463689959

List of values

[1, 1, 17, 81, 702, 4623, 35044, 248045, 1819731, 13110984, 95362462, 690253391, 5008926698, 36300216768, 263252448712, 1908449014617, 13837881924141, 100326715619679, 727420462629671, 5274035027493046, 38238994112367061, 277246970248002472, 2010151423463689959]

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

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