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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.

A244004 a(n) = Sum_{k=0..n} binomial(n,k) * (1 + 3^k)^k.

Table of values

n a(n)
0 1
1 5
2 109
3 22265
4 45300601
5 865092893645
6 151339416167296549
7 240067372975786948895105
8 3437874756032842865408439504241
9 443629315988897178081546025182658298645
10 515464811455682924553846499988261249729439172189

List of values

[1, 5, 109, 22265, 45300601, 865092893645, 151339416167296549, 240067372975786948895105, 3437874756032842865408439504241, 443629315988897178081546025182658298645, 515464811455682924553846499988261249729439172189]

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

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