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.

A225981 Number of nX7 binary arrays whose sum with another nX7 binary array containing no more than two 1s has rows and columns in lexicographically nondecreasing order.

Table of values

n a(n)
1 64
2 1616
3 49811
4 1825607
5 69784592
6 2513743785
7 80901937149
8 2279339811483
9 56056577764123
10 1210023577040820
11 23129995837890549
12 395389054254892996
13 6101927873439814335
14 85761387564101647001

List of values

[64, 1616, 49811, 1825607, 69784592, 2513743785, 80901937149, 2279339811483, 56056577764123, 1210023577040820, 23129995837890549, 395389054254892996, 6101927873439814335, 85761387564101647001]

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

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