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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.

A224198 Number of n X n 0..3 arrays with rows unimodal and antidiagonals nondecreasing.

Table of values

n a(n)
1 4
2 160
3 16060
4 2411246
5 451319098
6 96914926654
7 22835261226043
8 5750097317505437
9 1521786116504544601
10 418628292901694453231
11 118789461093773656747975
12 34580941641153629118242103

List of values

[4, 160, 16060, 2411246, 451319098, 96914926654, 22835261226043, 5750097317505437, 1521786116504544601, 418628292901694453231, 118789461093773656747975, 34580941641153629118242103]

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

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