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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.

A301583 G.f.: Sum_{n>=0} 4^n * ((1+x)^n - 1)^n.

Table of values

n a(n)
0 1
1 4
2 64
3 1792
4 70736
5 3600128
6 224255040
7 16521605376
8 1405131880000
9 135480346104896
10 14602769310474240
11 1739917222954854400
12 227081534040721917952
13 32217108743091290851328
14 4936803887495636263284736
15 812576030237749532251019264
16 142976863303365903802301729024
17 26781577193841845859144244087808
18 5320767287406003709062843236972544
19 1117525692987087894816123931091214336

List of values

[1, 4, 64, 1792, 70736, 3600128, 224255040, 16521605376, 1405131880000, 135480346104896, 14602769310474240, 1739917222954854400, 227081534040721917952, 32217108743091290851328, 4936803887495636263284736, 812576030237749532251019264, 142976863303365903802301729024, 26781577193841845859144244087808, 5320767287406003709062843236972544, 1117525692987087894816123931091214336]

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

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