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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.

A216689 Expansion of e.g.f. exp( x * exp(x)^2 ).

Table of values

n a(n)
0 1
1 1
2 5
3 25
4 153
5 1121
6 9373
7 87417
8 898033
9 10052353
10 121492341
11 1573957529
12 21729801481
13 318121178337
14 4917743697805
15 79981695655801
16 1364227940101857
17 24335561350365953
18 452874096174214117
19 8772713803852981785
20 176541611843378273401
21 3684142819311127955041
22 79596388271096140589949

List of values

[1, 1, 5, 25, 153, 1121, 9373, 87417, 898033, 10052353, 121492341, 1573957529, 21729801481, 318121178337, 4917743697805, 79981695655801, 1364227940101857, 24335561350365953, 452874096174214117, 8772713803852981785, 176541611843378273401, 3684142819311127955041, 79596388271096140589949]

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

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