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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.

A229777 Number of 5X5 0..n arrays with rows in lexicographically nondecreasing order and columns in nonincreasing order.

Table of values

n a(n)
1 252
2 2179956
3 3062815568
4 843211336888
5 81937334158292
6 3896490956821414
7 110102810429666544
8 2093314279759590565
9 29136130649614970102
10 315228320642171324718
11 2770642691605055402356
12 20456013945849864263232

List of values

[252, 2179956, 3062815568, 843211336888, 81937334158292, 3896490956821414, 110102810429666544, 2093314279759590565, 29136130649614970102, 315228320642171324718, 2770642691605055402356, 20456013945849864263232]

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

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