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

0,2

Links

Reinhard Zumkeller, Table of n, a(n) for n = 0..250

Formula

a(n) = n*(n^(n+1) + n^2 - 2) / (2*(n-1)) for n>1.

Prog

(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

Crossrefs

Cf. A007778, A062970.

Sequence in context: A108205 A228938 A245000 * A325995 A366178 A049036

Adjacent sequences: A108394 A108395 A108396 * A108398 A108399 A108400

Keyword

nonn

Author

Reinhard Zumkeller, Jun 02 2005

Status

approved