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A156248 a(n)=sum(k=1,n,(-1)^k*A000002(2*k)) +0
1
-2, -1, -3, -1, -2, 0, -1, 0, -2, -1, -2, 0, -2, -1, -3, -2, -3, -1, -3, -2, -4, -2, -3, -2, -4, -3, -5, -3, -4, -2, -4, -3, -5, -4, -5, -3, -5, -4, -5, -3, -4, -2, -3, -2, -4, -2, -3, -1, -2, 0, -2, -1, -2, 0, -2, -1, -3, -2, -3, -1, -2, -1, -3, -2, -3, -1, -2, 0, -2, -1, -3 (list; graph; listen)
OFFSET

1,1

CROSSREFS

Sequence in context: A106740 A110619 A129761 this_sequence A123864 A035175 A106406

Adjacent sequences: A156245 A156246 A156247 this_sequence A156249 A156250 A156251

KEYWORD

sign

AUTHOR

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

page 1

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Last modified November 25 14:49 EST 2009. Contains 167514 sequences.


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