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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.

A207139 G.f.: exp( Sum_{n>=1} x^n/n * Sum_{k=0..n} binomial(n,k) * binomial(n^2,k^2) ).

Table of values

n a(n)
0 1
1 2
2 7
3 147
4 14481
5 6183605
6 19196862399
7 206667738393577
8 6727813723143519624
9 1368162090055314881480420
10 1237384559488983889303951699285
11 3014186760620644058660289396656407831
12 34123084437870355957570087446546456971276065

List of values

[1, 2, 7, 147, 14481, 6183605, 19196862399, 206667738393577, 6727813723143519624, 1368162090055314881480420, 1237384559488983889303951699285, 3014186760620644058660289396656407831, 34123084437870355957570087446546456971276065]

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

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