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.

A070307 Number of n X n matrices with nonnegative integer entries such that every row sum equals 3.

Table of values

n a(n)
1 1
2 16
3 1000
4 160000
5 52521875
6 30840979456
7 29509034655744
8 42998169600000000
9 90647430472564453125
10 265599227914240000000000
11 1047192117300356121695451136
12 5410240907043328777415185924096
13 35821862005173382840059779052734375
14 298285661929377847941529600000000000000

List of values

[1, 16, 1000, 160000, 52521875, 30840979456, 29509034655744, 42998169600000000, 90647430472564453125, 265599227914240000000000, 1047192117300356121695451136, 5410240907043328777415185924096, 35821862005173382840059779052734375, 298285661929377847941529600000000000000]

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

Content is available under The OEIS End-User License Agreement.