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A115526
Inverse of number triangle A115524.
2
1, 1, -1, 1, 0, 1, 1, 0, 1, -1, 1, -1, 0, 0, 1, 1, -1, 0, 0, 1, -1, 1, 0, 1, 0, 0, 0, 1, 1, 0, 1, 0, 0, 0, 1, -1, 1, 0, 1, -1, 0, 0, 0, 0, 1, 1, 0, 1, -1, 0, 0, 0, 0, 1, -1, 1, -1, 0, 0, 1, 0, 0, 0, 0, 0, 1, 1, -1, 0, 0, 1, 0, 0, 0, 0, 0, 1, -1, 1, -1, 0, 0, 1, -1, 0, 0, 0, 0, 0, 0, 1, 1, -1, 0, 0, 1, -1, 0, 0, 0, 0, 0, 0, 1, -1, 1, 0, 1, 0, 0, 0, 1
OFFSET
0,1
COMMENTS
Row sums are number of zeros in binary expansion of n+2, that is, A023416(n+2) [conjecture].
EXAMPLE
Triangle begins
1,
1, -1,
1, 0, 1,
1, 0, 1, -1,
1, -1, 0, 0, 1,
1, -1, 0, 0, 1, -1,
1, 0, 1, 0, 0, 0, 1,
1, 0, 1, 0, 0, 0, 1, -1,
1, 0, 1, -1, 0, 0, 0, 0, 1,
1, 0, 1, -1, 0, 0, 0, 0, 1, -1,
1, -1, 0, 0, 1, 0, 0, 0, 0, 0, 1,
1, -1, 0, 0, 1, 0, 0, 0, 0, 0, 1, -1,
1, -1, 0, 0, 1, -1, 0, 0, 0, 0, 0, 0, 1,
1, -1, 0, 0, 1, -1, 0, 0, 0, 0, 0, 0, 1, -1,
1, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1,
1, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, -1,
1, 0, 1, 0, 0, 0, 1, -1, 0, 0, 0, 0, 0, 0, 0, 0, 1
CROSSREFS
Sequence in context: A182741 A070909 A115954 * A363343 A336923 A239681
KEYWORD
sign,tabl
AUTHOR
Paul Barry, Jan 25 2006
STATUS
approved