A069704 Let M_2n be the 2n X 2n matrix M_(i,j)=C(2i,j)-C(2j,i) where C(k,l) denotes the binomial coefficients; then a(n)=det(M_2n).

9, 2401, 7139584, 7429060864, 8768304271322176, 55287838983612748529926144, 28712457542131501655125523112656896, 597353290725130889841630014909751870078582784

Offset

1,1

Comments

det(M_{2n+1})=0

Links

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

Crossrefs

Cf. A005249, A060739, A067689.

Sequence in context: A058428 A323517 A278914 * A033997 A068729 A321282

Adjacent sequences: A069701 A069702 A069703 * A069705 A069706 A069707

Keyword

easy,nonn

Author

Benoit Cloitre, Apr 21 2002

Status

approved