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.

A223675 Number of n X n 0..1 arrays with rows and antidiagonals unimodal.

Table of values

n a(n)
1 2
2 16
3 316
4 9822
5 384009
6 17068664
7 821284360
8 41697505423
9 2202335611907
10 120016210924727
11 6715040320826544
12 384617913213951506
13 22513060559771644440
14 1345458233683987073442
15 82071805127975022481091

List of values

[2, 16, 316, 9822, 384009, 17068664, 821284360, 41697505423, 2202335611907, 120016210924727, 6715040320826544, 384617913213951506, 22513060559771644440, 1345458233683987073442, 82071805127975022481091]

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

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