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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.

A357502 a(n) = ((1 + sqrt(n))^n - (1 - sqrt(n))^n)/(2*sqrt(n)).

Table of values

n a(n)
1 1
2 2
3 6
4 20
5 80
6 342
7 1624
8 8136
9 43776
10 246410
11 1463264
12 9033180
13 58200064
14 387905182
15 2679200640
16 19068105488
17 139929124864
18 1054773505170
19 8167509816832
20 64795371984420
21 526534098026496
22 4374163243287398
23 37135913476691968
24 321727849480560600

List of values

[1, 2, 6, 20, 80, 342, 1624, 8136, 43776, 246410, 1463264, 9033180, 58200064, 387905182, 2679200640, 19068105488, 139929124864, 1054773505170, 8167509816832, 64795371984420, 526534098026496, 4374163243287398, 37135913476691968, 321727849480560600]

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

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