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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.

A319947 G.f.: Sum_{n>=0} ( 1/(1-x)^n - (1-x)^n )^n.

Table of values

n a(n)
0 1
1 2
2 17
3 233
4 4457
5 109599
6 3294200
7 117023348
8 4796944724
9 222859320409
10 11572143728964
11 664158801170094
12 41748985785588788
13 2852580634624308469
14 210503045435437702457
15 16684642612290860954017
16 1413651317086090261964496
17 127503642994522759923638691
18 12197174216389125259958117521
19 1233478106868364650369933771887

List of values

[1, 2, 17, 233, 4457, 109599, 3294200, 117023348, 4796944724, 222859320409, 11572143728964, 664158801170094, 41748985785588788, 2852580634624308469, 210503045435437702457, 16684642612290860954017, 1413651317086090261964496, 127503642994522759923638691, 12197174216389125259958117521, 1233478106868364650369933771887]

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

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