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.

A228389 Number of nX7 binary arrays with top left value 1 and no two ones adjacent horizontally or vertically.

Table of values

n a(n)
1 13
2 169
3 3513
4 62546
5 1177709
6 21683149
7 402968942
8 7458864720
9 138305554175
10 2562514124813
11 47494743530686
12 880148347563002
13 16311635295084771
14 302290762813484314
15 5602201879906920864
16 103822064306056848780

List of values

[13, 169, 3513, 62546, 1177709, 21683149, 402968942, 7458864720, 138305554175, 2562514124813, 47494743530686, 880148347563002, 16311635295084771, 302290762813484314, 5602201879906920864, 103822064306056848780]

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

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