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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.

A136556 a(n) = binomial(2^n - 1, n).

Table of values

n a(n)
0 1
1 1
2 3
3 35
4 1365
5 169911
6 67945521
7 89356415775
8 396861704798625
9 6098989894499557055
10 331001552386330913728641
11 64483955378425999076128999167
12 45677647585984911164223317311276545
13 118839819203635450208125966070067352769535
14 1144686912178270649701033287538093722740144666625

List of values

[1, 1, 3, 35, 1365, 169911, 67945521, 89356415775, 396861704798625, 6098989894499557055, 331001552386330913728641, 64483955378425999076128999167, 45677647585984911164223317311276545, 118839819203635450208125966070067352769535, 1144686912178270649701033287538093722740144666625]

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

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