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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.

A336639 Sum_{n>=0} a(n) * x^n / (n!)^2 = 1 / BesselJ(0,2*sqrt(x))^4.

Table of values

n a(n)
0 1
1 4
2 36
3 544
4 12196
5 377904
6 15438816
7 803602944
8 51908768676
9 4074743122384
10 382079412133936
11 42184889139337344
12 5417567866536188896
13 800808722921088352384
14 135006904500993157933056
15 25751088570167886107910144
16 5517695042810314282550432676

List of values

[1, 4, 36, 544, 12196, 377904, 15438816, 803602944, 51908768676, 4074743122384, 382079412133936, 42184889139337344, 5417567866536188896, 800808722921088352384, 135006904500993157933056, 25751088570167886107910144, 5517695042810314282550432676]

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

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