0,2

This sequence is the Hankel transform (see A001906 for definition)of the sequence defined by, for n>=0, a(n) = |A001469(n+1)|; example: det([1, 1, 3, 17; 1, 3, 17, 155; 3, 17, 155, 2073; 17, 155, 2073, 38227]) = 497664 = 4!*12^4.

a(n) = (n+1)!*A000178(n)^4 = (n+1)!*A055209(n)^2.

Cf. A000178 A001469 A001906 A055209.

Sequence in context: A065128 A122222 A036980 this_sequence A165642 A057528 A164335

Adjacent sequences: A091807 A091808 A091809 this_sequence A091811 A091812 A091813

nonn

DELEHAM Philippe (kolotoko(AT)wanadoo.fr), Mar 07 2004