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A115636 A divide-and-conquer number triangle. 3
1, 1, -1, 4, 0, 1, 4, 0, 1, -1, 4, -4, 0, 0, 1, 4, -4, 0, 0, 1, -1, 16, 0, 4, 0, 0, 0, 1, 16, 0, 4, 0, 0, 0, 1, -1, 16, 0, 4, -4, 0, 0, 0, 0, 1, 16, 0, 4, -4, 0, 0, 0, 0, 1, -1, 16, -16, 0, 0, 4, 0, 0, 0, 0, 0, 1, 16, -16, 0, 0, 4, 0, 0, 0, 0, 0, 1, -1, 16, -16, 0, 0, 4, -4, 0, 0, 0, 0, 0, 0, 1, 16, -16, 0, 0, 4, -4, 0, 0, 0, 0, 0, 0, 1, -1 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

0,4

COMMENTS

Inverse of A115633. Row sums are A115637. First column is A115639.

LINKS

Table of n, a(n) for n=0..104.

EXAMPLE

Triangle begins

1,

1, -1,

4, 0, 1,

4, 0, 1, -1,

4, -4, 0, 0, 1,

4, -4, 0, 0, 1, -1,

16, 0, 4, 0, 0, 0, 1,

16, 0, 4, 0, 0, 0, 1, -1,

16, 0, 4, -4, 0, 0, 0, 0, 1,

16, 0, 4, -4, 0, 0, 0, 0, 1, -1,

16, -16, 0, 0, 4, 0, 0, 0, 0, 0, 1,

16, -16, 0, 0, 4, 0, 0, 0, 0, 0, 1, -1,

16, -16, 0, 0, 4, -4, 0, 0, 0, 0, 0, 0, 1,

16, -16, 0, 0, 4, -4, 0, 0, 0, 0, 0, 0, 1, -1,

64, 0, 16, 0, 0, 0, 4, 0, 0, 0, 0, 0, 0, 0, 1,

64, 0, 16, 0, 0, 0, 4, 0, 0, 0, 0, 0, 0, 0, 1, -1,

64, 0, 16, 0, 0, 0, 4, -4, 0, 0, 0, 0, 0, 0, 0, 0, 1

CROSSREFS

Sequence in context: A221275 A176803 A115715 * A292143 A281441 A213600

Adjacent sequences:  A115633 A115634 A115635 * A115637 A115638 A115639

KEYWORD

sign,tabl

AUTHOR

Paul Barry, Jan 27 2006

STATUS

approved

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Last modified July 27 07:36 EDT 2021. Contains 346304 sequences. (Running on oeis4.)