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.

A203179 Number of nX6 0..2 arrays with every 1 immediately preceded by 0 to the left or above, no 0 immediately preceded by a 0, and every 2 immediately preceded by 0 1 to the left or above.

Table of values

n a(n)
1 4
2 10
3 97
4 724
5 4654
6 32411
7 223567
8 1625772
9 10889470
10 76035931
11 539862935
12 3683134752
13 25862504933
14 179896714051
15 1247517606405
16 8718625375796
17 60458475058013
18 421400784685266
19 2932977483238766
20 20384373553735223

List of values

[4, 10, 97, 724, 4654, 32411, 223567, 1625772, 10889470, 76035931, 539862935, 3683134752, 25862504933, 179896714051, 1247517606405, 8718625375796, 60458475058013, 421400784685266, 2932977483238766, 20384373553735223]

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

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