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A134827 Alternating row sums of triangle A134285, called s2(3)'. 2
1, 2, 8, 18, 78, 206, 872, 2226, 10820, 26558, 129248, 335886, 1630174, 3990978, 21778450, 48749804, 274937594, 650637382, 3598954596, 7610277626, 49741540498, 93757794966, 639655810986, 1233712869392, 8530089042832 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..25.

FORMULA

a(n))=sum(A134285(n,m)*(-1)^(m-1),m=1..n), n>=1.

CROSSREFS

Cf. A134826 (row sums of triangle A134285).

Sequence in context: A268658 A074128 A061226 * A222361 A134789 A058217

Adjacent sequences:  A134824 A134825 A134826 * A134828 A134829 A134830

KEYWORD

nonn,easy

AUTHOR

Wolfdieter Lang Nov 13 2007

STATUS

approved

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Last modified September 20 19:47 EDT 2021. Contains 347589 sequences. (Running on oeis4.)