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.

A213795 Number of n X n 0..3 symmetric arrays with every row summing to floor(n*3/2).

Table of values

n a(n)
0 1
1 1
2 4
3 29
4 880
5 87932
6 34725760
7 46259653191
8 250599609089536
9 4664255347861848000
10 359514810915617810737152
11 96221422835240936091862618254
12 107926925135028470351157750883132800
13 423270762332675097186733226425581010359872

List of values

[1, 1, 4, 29, 880, 87932, 34725760, 46259653191, 250599609089536, 4664255347861848000, 359514810915617810737152, 96221422835240936091862618254, 107926925135028470351157750883132800, 423270762332675097186733226425581010359872]

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

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