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 3 times column 2 of T^2 (matrix square of A123305).

Cf. A123305; A123306, A123307, A123309; A123310, A123311.

Sequence in context: A039618 A127129 A107708 this_sequence A074525 A118331 A138420

Adjacent sequences: A123305 A123306 A123307 this_sequence A123309 A123310 A123311

nonn

Paul D. Hanna (pauldhanna(AT)juno.com), Sep 24 2006