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.

A183723 1/12 the number of (n+1) X 4 0..5 arrays with every 2 X 2 subblock strictly increasing clockwise or counterclockwise with one decrease, and at least two adjacent blocks having the same increasing direction.

Table of values

n a(n)
1 12
2 29
3 124
4 1790
5 30939
6 525895
7 8439116
8 130610844
9 1967828529
10 29070445544
11 422988995515
12 6081228134954
13 86580348551185
14 1222760452357981
15 17151917685428842
16 239202719875959959
17 3319294757106439138

List of values

[12, 29, 124, 1790, 30939, 525895, 8439116, 130610844, 1967828529, 29070445544, 422988995515, 6081228134954, 86580348551185, 1222760452357981, 17151917685428842, 239202719875959959, 3319294757106439138]