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A104879 Row sums of a sum-of-powers triangle. 2
1, 2, 4, 8, 17, 40, 106, 316, 1049, 3830, 15208, 65072, 297841, 1449756, 7468542, 40555748, 231335961, 1381989882, 8623700812, 56078446616, 379233142801, 2662013133296, 19362917622002, 145719550012300, 1133023004941273 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Row sums of A104878.

LINKS

Table of n, a(n) for n=0..24.

FORMULA

a(n)=1+n+sum{k=2..n+1, (k^(n-k+1)-1)/(k-1)}

CROSSREFS

Sequence in context: A304970 A090375 A210540 * A156805 A200542 A272105

Adjacent sequences:  A104876 A104877 A104878 * A104880 A104881 A104882

KEYWORD

easy,nonn

AUTHOR

Paul Barry, Mar 28 2005

STATUS

approved

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Last modified March 23 14:17 EDT 2019. Contains 321431 sequences. (Running on oeis4.)