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.

A194992 Number of lower triangles of an n X n 0..2 array with each element differing from all of its horizontal and vertical neighbors by one.

Table of values

n a(n)
1 3
2 6
3 20
4 80
5 576
6 4608
7 69632
8 1114112
9 34603008
10 1107296256
11 69793218560
12 4466765987840
13 567347999932416
14 72620543991349248
15 18518801667747479552
16 4740813226943354765312
17 2422574005712127994626048

List of values

[3, 6, 20, 80, 576, 4608, 69632, 1114112, 34603008, 1107296256, 69793218560, 4466765987840, 567347999932416, 72620543991349248, 18518801667747479552, 4740813226943354765312, 2422574005712127994626048]

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

Content is available under The OEIS End-User License Agreement.