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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.

A184043 1/9 the number of (n+1) X 5 0..2 arrays with all 2 X 2 subblocks having the same four values.

Table of values

n a(n)
1 45
2 51
3 61
4 81
5 117
6 189
7 325
8 597
9 1125
10 2181
11 4261
12 8421
13 16677
14 33189
15 66085
16 131877
17 263205
18 525861
19 1050661
20 2100261
21 4198437
22 8394789
23 16785445
24 33566757
25 67125285
26 134242341
27 268468261
28 536920101
29 1073807397
30 2147581989
31 4295098405

List of values

[45, 51, 61, 81, 117, 189, 325, 597, 1125, 2181, 4261, 8421, 16677, 33189, 66085, 131877, 263205, 525861, 1050661, 2100261, 4198437, 8394789, 16785445, 33566757, 67125285, 134242341, 268468261, 536920101, 1073807397, 2147581989, 4295098405]

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

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