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A136563 Leftmost column of triangle A136561. 2
1, 2, 4, -5, 13, -30, 75, -200, 524, -1299, 3038, -6762, 14482, -30162, 61691, -124998, 252744, -512805, 1047661, -2158235, 4481801, -9368303, 19674518, -41437744, 87399483, -184412912, 388975790, -819684340, 1724741941, -3621720214, 7585569484, -15839701483 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Requiring that the absolute values of the differences in the difference triangle only occur at most once each leads to the Zorach additive triangle. (See A035312.) The leftmost column of the Zorach additive triangle is A035311.

LINKS

Table of n, a(n) for n=1..32.

CROSSREFS

Cf. A035311, A136561, A136562.

Sequence in context: A102992 A273097 A232207 * A127077 A104549 A174513

Adjacent sequences:  A136560 A136561 A136562 * A136564 A136565 A136566

KEYWORD

sign

AUTHOR

Leroy Quet, Jan 06 2008

EXTENSIONS

More terms from Andrey Zabolotskiy, May 29 2017

STATUS

approved

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Last modified March 31 16:23 EDT 2020. Contains 333151 sequences. (Running on oeis4.)