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.

A280360 Number of nX5 0..2 arrays with no element equal to more than one of its horizontal and vertical neighbors and with new values introduced in order 0 sequentially upwards.

Table of values

n a(n)
1 30
2 1617
3 78800
4 3992071
5 201054068
6 10144351660
7 511688896140
8 25812250379197
9 1302084964081326
10 65683250595897258
11 3313367690989159234
12 167141663155726686922
13 8431401872254944607810
14 425319079112261667548370

List of values

[30, 1617, 78800, 3992071, 201054068, 10144351660, 511688896140, 25812250379197, 1302084964081326, 65683250595897258, 3313367690989159234, 167141663155726686922, 8431401872254944607810, 425319079112261667548370]

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

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