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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.

A121011 Denominators of partial alternating sums of Catalan numbers scaled by powers of 1/(5*8^2) = 1/320.

Table of values

n a(n)
0 1
1 320
2 51200
3 6553600
4 5242880000
5 1677721600000
6 268435456000000
7 343597383680000000
8 2199023255552000000
9 17592186044416000000000
10 2814749767106560000000000
11 1801439850948198400000000000

List of values

[1, 320, 51200, 6553600, 5242880000, 1677721600000, 268435456000000, 343597383680000000, 2199023255552000000, 17592186044416000000000, 2814749767106560000000000, 1801439850948198400000000000]

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

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