A328978 Row sums of A329059.
1, 4, 27, 233, 2392, 28554, 393642, 6247511, 113612460, 2349157984, 54693260003, 1419193978899, 40649683449268, 1274332809446116, 43403931028963260, 1596092227004496195, 63024526636437361468, 2659705693841420725200, 119463071327339129567836, 5690148543901378578826660
Offset: 0
Keywords
Links
- Stefano Spezia, Table of n, a(n) for n = 0..385
Programs
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Mathematica
Table[(Binomial[2+4n,n]Hypergeometric2F1[1,-n, -2-4n, 1+n])/(1+n),{n,0,19}]
Formula
a(n) = binomial(2 + 4*n, n)*2F1([1, -n], [-2 - 4*n], 1 + n)/(1 + n), where 2F1 is the hypergeometric function.
a(n) ~ exp(4) * n^(n-1). - Stefano Spezia, Sep 03 2020