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A115525
Periodic {1,1,-2,0,1,0,-1,0,0,1,-1,-1}.
1
1, 1, -2, 0, 1, 0, -1, 0, 0, 1, -1, -1, 1, 1, -2, 0, 1, 0, -1, 0, 0, 1, -1, -1, 1, 1, -2, 0, 1, 0, -1, 0, 0, 1, -1, -1, 1, 1, -2, 0, 1, 0, -1, 0, 0, 1, -1, -1, 1, 1, -2, 0, 1, 0, -1, 0, 0, 1, -1, -1, 1, 1, -2, 0, 1, 0, -1, 0, 0, 1, -1, -1
OFFSET
0,3
COMMENTS
Diagonal sums of number triangle A115524.
FORMULA
G.f.: (1+2x-x^3-2x^4-x^5)/(1+x+x^2-x^4-x^5-x^6).
MATHEMATICA
PadRight[{}, 120, {1, 1, -2, 0, 1, 0, -1, 0, 0, 1, -1, -1}] (* Harvey P. Dale, Aug 20 2021 *)
CROSSREFS
Sequence in context: A070100 A070095 A060951 * A241910 A065717 A070092
KEYWORD
easy,sign
AUTHOR
Paul Barry, Jan 25 2006
STATUS
approved