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.

A303045 Number of 7Xn 0..1 arrays with every element equal to 0, 1, 3, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Table of values

n a(n)
1 64
2 86
3 459
4 1686
5 9882
6 63254
7 345668
8 1853428
9 10924077
10 67726475
11 403669088
12 2380303051
13 14509938056
14 90934286594
15 564101640722
16 3472561956163
17 21698726671644
18 137462825832230
19 867471097889215
20 5452385965874930

List of values

[64, 86, 459, 1686, 9882, 63254, 345668, 1853428, 10924077, 67726475, 403669088, 2380303051, 14509938056, 90934286594, 564101640722, 3472561956163, 21698726671644, 137462825832230, 867471097889215, 5452385965874930]

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

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