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.

A116421 a(n) = 2^(n-1)*binomial(2n-1,n-1)^2.

Table of values

n a(n)
0 0
1 1
2 18
3 400
4 9800
5 254016
6 6830208
7 188457984
8 5300380800
9 151289881600
10 4369251780608
11 127394382495744
12 3743979352236032
13 110768619888640000
14 3295931587706880000
15 98555678764852838400
16 2959750227906986803200

List of values

[0, 1, 18, 400, 9800, 254016, 6830208, 188457984, 5300380800, 151289881600, 4369251780608, 127394382495744, 3743979352236032, 110768619888640000, 3295931587706880000, 98555678764852838400, 2959750227906986803200]

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

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