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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.

A071579 a(n) = 2*a(n-1)*A002812(n-1), starting a(0)=1.

Table of values

n a(n)
0 1
1 4
2 56
3 10864
4 408855776
5 579069776145402304
6 1161588808526051807570761628582646656
7 4674072680304961790168962360144614650442718636276775741658113370728376064

List of values

[1, 4, 56, 10864, 408855776, 579069776145402304, 1161588808526051807570761628582646656, 4674072680304961790168962360144614650442718636276775741658113370728376064]

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

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