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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.

A259326 Ceiling of ((2^n)!+(2^n-1)^2*(2^(n-1))!*2^(2^(n-1)))/(4^n*(n!)^2).

Table of values

n a(n)
1 1
2 2
3 26
4 141907500
5 17844701940490373256193966080
6 59757436204078657410908164193971177467473348779378572774972093904092502425600000

List of values

[1, 2, 26, 141907500, 17844701940490373256193966080, 59757436204078657410908164193971177467473348779378572774972093904092502425600000]

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

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