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Revision History for A156249

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A156249

a(n)=sum(k=1,n,(-1)^k*A000002(2*k-1))
(history; published version)

#2 by Russ Cox at Fri Mar 30 18:39:28 EDT 2012

AUTHOR

_Benoit Cloitre (benoit7848c(AT)orange.fr), _, Feb 07 2009

Discussion

Fri Mar 30

18:39

OEIS Server: https://oeis.org/edit/global/216

#1 by N. J. A. Sloane at Fri Feb 27 03:00:00 EST 2009

NAME

a(n)=sum(k=1,n,(-1)^k*A000002(2*k-1))

DATA

-1, 1, 0, 1, -1, 1, 0, 2, 1, 3, 1, 2, 1, 3, 2, 3, 1, 3, 2, 4, 3, 4, 2, 4, 3, 4, 2, 3, 1, 2, 1, 3, 1, 2, 0, 1, 0, 2, 0, 1, -1, 1, 0, 2, 0, 1, -1, 0, -1, 1, 0, 1, -1, 1, 0, 2, 1, 2, 0, 2, 1, 3, 2, 4, 2, 3, 2, 4, 3, 5, 4, 5, 3, 5, 4, 6, 4, 5, 4, 6, 5, 7, 5, 6, 4, 6, 5, 6, 4, 5, 3, 5, 4, 5, 3, 4, 3, 5, 3, 4

OFFSET

1,8

KEYWORD

sign,new

AUTHOR

Benoit Cloitre (benoit7848c(AT)orange.fr), Feb 07 2009

STATUS

approved