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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; internal format)
OFFSET

0,4

COMMENTS

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

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: A122873 A176803 A115715 * A178104 A172545 A124321

Adjacent sequences:  A115633 A115634 A115635 * A115637 A115638 A115639

KEYWORD

sign,tabl

AUTHOR

Paul Barry (pbarry(AT)wit.ie), Jan 27 2006

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Last modified February 17 07:41 EST 2012. Contains 205998 sequences.