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.

A301905 Number of nX7 0..1 arrays with every element equal to 0, 2 or 3 horizontally or antidiagonally adjacent elements, with upper left element zero.

Table of values

n a(n)
1 1
2 10
3 12
4 96
5 320
6 1934
7 8781
8 49709
9 253844
10 1413100
11 7620270
12 42580016
13 235818861
14 1324997099
15 7432214130
16 41943560072
17 236751899580
18 1339917222874
19 7587029374109
20 43012592771281
21 243943851904936
22 1384324886282580

List of values

[1, 10, 12, 96, 320, 1934, 8781, 49709, 253844, 1413100, 7620270, 42580016, 235818861, 1324997099, 7432214130, 41943560072, 236751899580, 1339917222874, 7587029374109, 43012592771281, 243943851904936, 1384324886282580]

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

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