A106339 Absolute row sums of triangle A106338.

1, 2, 6, 30, 270, 4830, 189630, 16912350, 3353412510, 1432516194270, 1288072947428190, 2400557459496515550, 9177479849690707865310, 71463760915341917360748510, 1127799535042492118475108550110

Offset

0,2

Links

Table of n, a(n) for n=0..14.

Prog

(PARI) {a(n)=sum(k=0, n, k!*abs((matrix(n+1, n+1, r, c, if(r>=c, (r-c)!* sum(m=0, r-c+1, (-1)^(r-c+1-m)*m^r/m!/(r-c+1-m)!)))^-1)[n+1, k+1]))}

Crossrefs

Cf. A106338.

Sequence in context: A066068 A121406 A028361 * A275593 A120295 A071350

Adjacent sequences: A106336 A106337 A106338 * A106340 A106341 A106342

Keyword

nonn

Author

Paul D. Hanna, May 01 2005

Status

approved