



0, 0, 0, 0, 0, 0, 0, 6, 6, 0, 0, 6, 6, 6, 0, 30, 24, 0, 0, 6, 6, 6, 0, 30, 24, 6, 0, 30, 24, 24, 12, 126, 78, 12, 0, 6, 6, 6, 0, 30, 24, 6, 0, 30, 24, 24, 12, 126, 78, 6, 0, 30, 24, 24, 6, 114, 90, 6, 12, 126, 54, 102, 72, 450, 228, 60, 0, 6, 6, 6, 0
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OFFSET

1,8


COMMENTS

It appears that the absolute value of a(n) is a multiple of 6, see A008588.  Omar E. Pol, Dec 06 2013


LINKS



EXAMPLE

Written as an irregular triangle in which row lengths is A011782 the sequence begins:
. 0;
. 0;
. 0, 0;
. 0, 0,0,6;
. 6, 0,0,6,6,6,0,30;
. 24, 0,0,6,6,6,0,30,24,6,0,30,24,24,12,126;
. 78,12,0,6,6,6,0,30,24,6,0,30,24,24,12,126,78,6,0,30,24,24,6,114,90,6,12,126,54,102,72,450;
. 228,60,0,6,6,6,0...
(End)


CROSSREFS

Cf. A011782, A048883, A139250, A139251, A160120, A160121, A151710, A173066, A173067, A173068, A173452, A173453.


KEYWORD

sign,tabf


AUTHOR



EXTENSIONS



STATUS

approved



