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A127251 Inverse of number triangle A127249. 2
1, -2, 1, 2, -2, 1, 0, 0, 0, 1, 0, 0, 0, -2, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, -2, 1, 0, 0, 0, 0, 0, 0, 2, -2, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Product of A127248 and A127244. Row sums are A127252.

LINKS

Table of n, a(n) for n=0..65.

EXAMPLE

Triangle begins

1,

-2, 1,

2, -2, 1,

0, 0, 0, 1,

0, 0, 0, -2, 1,

0, 0, 0, 0, 0, 1,

0, 0, 0, 0, 0, 0, 1,

0, 0, 0, 0, 0, 0, -2, 1,

0, 0, 0, 0, 0, 0, 2, -2, 1,

0, 0, 0, 0, 0, 0, 0, 0, 0, 1,

0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1

CROSSREFS

Sequence in context: A200227 A316230 A127249 * A063251 A060208 A004570

Adjacent sequences:  A127248 A127249 A127250 * A127252 A127253 A127254

KEYWORD

sign,tabl

AUTHOR

Paul Barry, Jan 10 2007

STATUS

approved

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Last modified October 25 19:28 EDT 2020. Contains 338012 sequences. (Running on oeis4.)