0,2

Triangle T=A123305 is defined by: (column k of T) = (k+1)*(column k of T^2) shifted to have an initial '1'; thus this sequence shifted left equals 4 times column 3 of T^2 (matrix square of A123305).

Cf. A123305; A123306, A123307, A123308; A123310, A123311.

Adjacent sequences: A123306 A123307 A123308 this_sequence A123310 A123311 A123312

Sequence in context: A061631 A099912 A002005 this_sequence A051489 A047053 A007763

nonn

Paul D. Hanna (pauldhanna(AT)juno.com), Sep 25 2006