A108397 Sums of rows of the triangle in A108396.
0, 2, 10, 66, 692, 9780, 167982, 3362828, 76695880, 1961316270, 55555555610, 1726135607262, 58359930206844, 2132745542253872, 83767436069591302, 3518790190560477240, 157412216095654840592, 7471013615160978901626
Offset: 0
Keywords
Links
- Reinhard Zumkeller, Table of n, a(n) for n = 0..250
Programs
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Haskell
a108397 0 = 0 a108397 1 = 2 a108397 n = n * (n^(n+1) + n^2 - 2) `div` (2 * (n-1)) -- Reinhard Zumkeller, Mar 31 2015
Formula
a(n) = n*(n^(n+1) + n^2 - 2) / (2*(n-1)) for n>1.