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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.

A054867 Number of non-attacking configurations on a diamond of size n, where a prince attacks the four adjacent non-diagonal squares.

Table of values

n a(n)
0 1
1 2
2 17
3 689
4 139344
5 142999897
6 748437606081
7 19999400591072512
8 2728539172202554958697
9 1900346273206544901717879089
10 6755797872872106084596492075448192
11 122584407857548123729431742141838309441329
12 11352604691637658946858196503018301306800588837281

List of values

[1, 2, 17, 689, 139344, 142999897, 748437606081, 19999400591072512, 2728539172202554958697, 1900346273206544901717879089, 6755797872872106084596492075448192, 122584407857548123729431742141838309441329, 11352604691637658946858196503018301306800588837281]

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

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