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.

A331389 Number of binary matrices with n distinct columns and any number of nonzero rows with 3 ones in every column and rows in nonincreasing lexicographic order.

Table of values

n a(n)
0 1
1 1
2 3
3 29
4 666
5 28344
6 1935054
7 193926796
8 26892165502
9 4946464286746
10 1168900475263013
11 346080409272270888
12 125798338606148948325
13 55204084562033205121607
14 28834556615453989801860765
15 17710828268156331289770544579
16 12658784968736373972502731143309

List of values

[1, 1, 3, 29, 666, 28344, 1935054, 193926796, 26892165502, 4946464286746, 1168900475263013, 346080409272270888, 125798338606148948325, 55204084562033205121607, 28834556615453989801860765, 17710828268156331289770544579, 12658784968736373972502731143309]

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

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