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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.

A181418 a(n) = A000984(n)*A000172(n), which is the term-wise product of the Central binomial coefficients and Franel numbers, respectively.

Table of values

n a(n)
0 1
1 4
2 60
3 1120
4 24220
5 567504
6 14030016
7 360222720
8 9513014940
9 256758913840
10 7051260776560
11 196403499277440
12 5535202897806400
13 157551884911456000
14 4522682234563776000
15 130783762623673221120
16 3806221127760278029980

List of values

[1, 4, 60, 1120, 24220, 567504, 14030016, 360222720, 9513014940, 256758913840, 7051260776560, 196403499277440, 5535202897806400, 157551884911456000, 4522682234563776000, 130783762623673221120, 3806221127760278029980]

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

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