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.

A251243 Number of (n+1) X (2+1) 0..2 arrays with no 2 X 2 subblock having the sum of its diagonal elements less than the minimum of its antidiagonal elements.

Table of values

n a(n)
1 621
2 14265
3 327753
4 7530633
5 173028393
6 3975606801
7 91345992921
8 2098821870081
9 48223825786089
10 1108020364732593
11 25458559305394041
12 584951560945849089
13 13440207851070791625
14 308810505245808515409
15 7095420636859874120985

List of values

[621, 14265, 327753, 7530633, 173028393, 3975606801, 91345992921, 2098821870081, 48223825786089, 1108020364732593, 25458559305394041, 584951560945849089, 13440207851070791625, 308810505245808515409, 7095420636859874120985]

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

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