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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.

A344055 a(n) = 2^n * n! * [x^n](exp(2*x) * BesselI(1, x)).

Table of values

n a(n)
0 0
1 1
2 8
3 51
4 304
5 1770
6 10224
7 58947
8 340064
9 1964862
10 11374000
11 65966318
12 383289504
13 2230877428
14 13005037920
15 75923905635
16 443837331648
17 2597761611894
18 15221636471088
19 89283411393018
20 524194439193120
21 3080311943546124
22 18115458433730592
23 106618075368243534

List of values

[0, 1, 8, 51, 304, 1770, 10224, 58947, 340064, 1964862, 11374000, 65966318, 383289504, 2230877428, 13005037920, 75923905635, 443837331648, 2597761611894, 15221636471088, 89283411393018, 524194439193120, 3080311943546124, 18115458433730592, 106618075368243534]

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

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