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 2 times column 1 of T^2 (matrix square of A123305).

Cf. A123305; A123306, A123308, A123309; A123310, A123311.

Sequence in context: A137984 A005649 A005363 this_sequence A126101 A002500 A002833

Adjacent sequences: A123304 A123305 A123306 this_sequence A123308 A123309 A123310

nonn

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