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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.

A081563 Second binomial transform of expansion of exp(2*cosh(x)).

Table of values

n a(n)
0 1
1 2
2 6
3 20
4 78
5 332
6 1566
7 7940
8 43518
9 253532
10 1573566
11 10295540
12 71069598
13 513897932
14 3893187486
15 30741656420
16 252979075518
17 2161184079932
18 19161309456126
19 175782239098580
20 1667967153565278
21 16331180476591532

List of values

[1, 2, 6, 20, 78, 332, 1566, 7940, 43518, 253532, 1573566, 10295540, 71069598, 513897932, 3893187486, 30741656420, 252979075518, 2161184079932, 19161309456126, 175782239098580, 1667967153565278, 16331180476591532]

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

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