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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.

A291586 a(n) = ((2n-1)!!)^4 * Sum_{i=1..n} 1/(2*i-1)^4.

Table of values

n a(n)
0 0
1 1
2 82
3 51331
4 123296356
5 809068942341
6 11846375878465206
7 338356017569383549191
8 17129606870671774862445000
9 1430698777932227525446706735625
10 186451505481090040331197201556276250
11 36261458995575361475673937929555130516875

List of values

[0, 1, 82, 51331, 123296356, 809068942341, 11846375878465206, 338356017569383549191, 17129606870671774862445000, 1430698777932227525446706735625, 186451505481090040331197201556276250, 36261458995575361475673937929555130516875]

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

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