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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.

A385438 a(n) = Sum_{k=0..n} 3^k * binomial(3*n+k-1,k).

Table of values

n a(n)
0 1
1 10
2 208
3 4888
4 121132
5 3092950
6 80506684
7 2123780536
8 56581885468
9 1518936682888
10 41021505946468
11 1113273696074968
12 30335161535834212
13 829405495046080612
14 22742967214283811976
15 625193974445825554408
16 17223870801864911429404
17 475423918887141016417144

List of values

[1, 10, 208, 4888, 121132, 3092950, 80506684, 2123780536, 56581885468, 1518936682888, 41021505946468, 1113273696074968, 30335161535834212, 829405495046080612, 22742967214283811976, 625193974445825554408, 17223870801864911429404, 475423918887141016417144]

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

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