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.

A268161 Number of 4Xn arrays containing n copies of 0..4-1 with every element equal to at least one vertical or antidiagonal neighbor and the top left element equal to 0.

Table of values

n a(n)
1 0
2 6
3 36
4 906
5 31818
6 770406
7 28194516
8 857204082
9 29334686760
10 981701367120
11 33610273278060
12 1163386717573176
13 40538287466544630
14 1426710530475496692
15 50491865673413814126
16 1798794705043994212440
17 64408154737694955274872

List of values

[0, 6, 36, 906, 31818, 770406, 28194516, 857204082, 29334686760, 981701367120, 33610273278060, 1163386717573176, 40538287466544630, 1426710530475496692, 50491865673413814126, 1798794705043994212440, 64408154737694955274872]

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

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