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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.

A317798 G.f.: Sum_{n>=0} (3*(1+x)^n - 1)^n / 3^(n+1).

Table of values

n a(n)
0 1
1 15
2 786
3 69261
4 8554530
5 1359020643
6 263929299177
7 60582032629791
8 16046282916588207
9 4817035600778756553
10 1616224504900354928832
11 599373591433178971787007
12 243449152911402772344286998
13 107482020677618238226506065235
14 51249638236281451846248205583562
15 26247197050200652206165329786055981
16 14369481728948627418149559363836673273

List of values

[1, 15, 786, 69261, 8554530, 1359020643, 263929299177, 60582032629791, 16046282916588207, 4817035600778756553, 1616224504900354928832, 599373591433178971787007, 243449152911402772344286998, 107482020677618238226506065235, 51249638236281451846248205583562, 26247197050200652206165329786055981, 14369481728948627418149559363836673273]

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

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