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.

A267239 Number of n X n binary arrays with row sums nondecreasing and columns lexicographically nondecreasing.

Table of values

n a(n)
1 2
2 7
3 42
4 567
5 20040
6 2093467
7 683027146
8 723576702570
9 2549735632656528
10 30465608408449993885
11 1250919952257037350168062
12 178764247753852768666003981113
13 89752660973687899647122735126286078

List of values

[2, 7, 42, 567, 20040, 2093467, 683027146, 723576702570, 2549735632656528, 30465608408449993885, 1250919952257037350168062, 178764247753852768666003981113, 89752660973687899647122735126286078]

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

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