0,2

a(2)=-11 because it is the sum of all elements for h=2 in A129398:

.....1

..1.-3..1

1.-3.-7.-3..1

..1..3..1

.....1

Cf. A129398.

Sequence in context: A103510 A130730 A153697 this_sequence A145790 A143465 A116152

Adjacent sequences: A129396 A129397 A129398 this_sequence A129400 A129401 A129402

sign

Jonas Wallgren (jonwa(AT)ida.liu.se), Apr 13 2007