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.

A208860 Number of nX4 0..3 arrays with new values 0..3 introduced in row major order and no element equal to more than one of its immediate leftward or upward or left-upward diagonal neighbors.

Table of values

n a(n)
1 15
2 1691
3 273049
4 44452082
5 7240366702
6 1179377179523
7 192108983085145
8 31292693945057258
9 5097277404701734234
10 830297232890575975631
11 135247396001465780031025
12 22030493903508619572329906

List of values

[15, 1691, 273049, 44452082, 7240366702, 1179377179523, 192108983085145, 31292693945057258, 5097277404701734234, 830297232890575975631, 135247396001465780031025, 22030493903508619572329906]

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

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