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.

A213700 Half the number of 5X5 0..n symmetric arrays with no 2X2 subblock summing to 2n.

Table of values

n a(n)
1 529
2 750261
3 109820000
4 4286833981
5 83545858925
6 976919547736
7 8159542628448
8 51964311225934
9 271341777491743
10 1197645088919101
11 4637119560078960
12 16013821321719463
13 50395763900241707
14 145985579644461562

List of values

[529, 750261, 109820000, 4286833981, 83545858925, 976919547736, 8159542628448, 51964311225934, 271341777491743, 1197645088919101, 4637119560078960, 16013821321719463, 50395763900241707, 145985579644461562]

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

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