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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.

A120581 Hankel transform of sum{k=0..n, C(2k,k)*2^k}.

Table of values

n a(n)
0 1
1 4
2 -64
3 -28672
4 -17825792
5 -24696061952
6 -4398046511104
7 6413125869375586304
8 1279761316857673852911616
9 565738597953418785628899770368
10 372547299599873882347063111621541888
11 -5264848781000759906705331926184317767647232

List of values

[1, 4, -64, -28672, -17825792, -24696061952, -4398046511104, 6413125869375586304, 1279761316857673852911616, 565738597953418785628899770368, 372547299599873882347063111621541888, -5264848781000759906705331926184317767647232]

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

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