1,1
The initial 2 should probably be a 1, see: A011260. This would change all terms to: a(2) = 0 because of the singular determinant[1,1,2,2] = 0; a(3) = 52; a(4) = -34848; a(5) = -2211008492544.
a(2) = 2 =
|2 1|
|2 2|.
Cf. A000020, A011260, A119493.
Sequence in context: A100956 A078241 A068103 this_sequence A067091 A093596 A111819
Adjacent sequences: A119509 A119510 A119511 this_sequence A119513 A119514 A119515
easy,sign
Jonathan Vos Post (jvospost3(AT)gmail.com), May 27 2006
Search completed in 0.002 seconds