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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.

A163003 Number of n X 3 binary arrays with all 1s connected and a path of 1s from upper left corner to lower right corner.

Table of values

n a(n)
1 1
2 8
3 45
4 234
5 1193
6 6049
7 30616
8 154861
9 783150
10 3960215
11 20025500
12 101261654
13 512042141
14 2589202874
15 13092613725
16 66204360820
17 334770228305
18 1692805481383
19 8559872259604
20 43284012160451
21 218870755473698
22 1106746006355201
23 5596392811360844
24 28298825854292256

List of values

[1, 8, 45, 234, 1193, 6049, 30616, 154861, 783150, 3960215, 20025500, 101261654, 512042141, 2589202874, 13092613725, 66204360820, 334770228305, 1692805481383, 8559872259604, 43284012160451, 218870755473698, 1106746006355201, 5596392811360844, 28298825854292256]

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

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