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A027486 First column of triangle A027477, constructed from the Stirling numbers of the first kind. 1
1, 3, 23, 330, 7604, 256620, 11923260, 729524880, 56840099904, 5493503695680, 644870893060800, 90366972897801600, 14899694352066120960, 2855250418022402400000, 629258349435218754451200, 158034681938560927788288000, 44866854739192779425625292800 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..17.

FORMULA

a(n) = A027477(n,1).

a(n) = n!*Sum_{k=1..n} (-1)^(n-k)*Stirling1(n, k)/k. Sum_{n>=0} a(n)*x^n/n!^2 = -log(log(1-x))-Ei(1, log(1-x))-gamma. - Vladeta Jovovic, Jan 29 2005

CROSSREFS

Cf. A027477 (Square of normalized Stirling matrix of the first kind).

Sequence in context: A338301 A129458 A118184 * A092664 A260509 A073588

Adjacent sequences:  A027483 A027484 A027485 * A027487 A027488 A027489

KEYWORD

nonn,easy

AUTHOR

Olivier Gérard

EXTENSIONS

More terms from Sean A. Irvine, Nov 06 2019

STATUS

approved

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Last modified December 7 05:20 EST 2021. Contains 349567 sequences. (Running on oeis4.)