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.

A252072 Number of (n+2)X(5+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 3 or 4.

Table of values

n a(n)
1 767
2 3029
3 17455
4 92225
5 480464
6 2547765
7 13460641
8 71027923
9 375675345
10 1985308056
11 10482759501
12 55378851635
13 292644335776
14 1546162330278
15 8168095347950
16 43152835319630
17 227991513370743
18 1204546728063178

List of values

[767, 3029, 17455, 92225, 480464, 2547765, 13460641, 71027923, 375675345, 1985308056, 10482759501, 55378851635, 292644335776, 1546162330278, 8168095347950, 43152835319630, 227991513370743, 1204546728063178]

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

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