A069642 Let M_n be the n X n matrix with M_n(i,j)=1/(i+j+3); then a(n)=1/det(M_n).

5, 1260, 8890560, 1408264704000, 4485780768268800000, 269685408935166352128000000, 294004853789028834558485643264000000, 5657409727323500620299434201290024943616000000

Offset

1,1

Links

Table of n, a(n) for n=1..8.

Prog

(PARI) for(n=1, 10, print1(1/matdet(matrix(n, n, i, j, 1/(i+j+3))), ", "))

Crossrefs

Sequence in context: A034864 A157642 A234811 * A182345 A268485 A066162

Adjacent sequences: A069639 A069640 A069641 * A069643 A069644 A069645

Keyword

easy,nonn

Author

Benoit Cloitre, Apr 21 2002

Status

approved