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A106339
Absolute row sums of triangle A106338.
1
1, 2, 6, 30, 270, 4830, 189630, 16912350, 3353412510, 1432516194270, 1288072947428190, 2400557459496515550, 9177479849690707865310, 71463760915341917360748510, 1127799535042492118475108550110
OFFSET
0,2
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
KEYWORD
nonn
AUTHOR
Paul D. Hanna, May 01 2005
STATUS
approved