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A104872 Diagonal sums of a power triangle. 1
1, 0, 1, 1, 2, 3, 6, 12, 27, 64, 163, 441, 1268, 3855, 12344, 41464, 145653, 533736, 2036149, 8071785, 33192790, 141351715, 622384730, 2829417276, 13263528351, 64038928728, 318121600695, 1624347614737, 8517247764136, 45822087138879 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,5

COMMENTS

Diagonal sums of A004248.

LINKS

Table of n, a(n) for n=0..29.

FORMULA

a(n)=sum{k=0..floor(n/2), k^(n-2k)}

CROSSREFS

Sequence in context: A082395 A061343 A057649 * A006082 A122889 A014280

Adjacent sequences:  A104869 A104870 A104871 * A104873 A104874 A104875

KEYWORD

easy,nonn

AUTHOR

Paul Barry, Mar 28 2005

STATUS

approved

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Last modified August 23 11:47 EDT 2019. Contains 326222 sequences. (Running on oeis4.)