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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.

A367333 a(n) = 27^n * Sum_{k=0..n} binomial(-1/3, k)^2.

Table of values

n a(n)
0 1
1 30
2 846
3 23430
4 643635
5 17601732
6 480016620
7 13065872292
8 355170348720
9 9644965082940
10 261716257738980
11 7097365769203260
12 192376104782028120
13 5212313820585819540
14 141177183151026767580
15 3822747528826291049460
16 103486045894075138514445

List of values

[1, 30, 846, 23430, 643635, 17601732, 480016620, 13065872292, 355170348720, 9644965082940, 261716257738980, 7097365769203260, 192376104782028120, 5212313820585819540, 141177183151026767580, 3822747528826291049460, 103486045894075138514445]

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

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