A132987 Column 0 of triangle A132986.

1, 1, 2, 12, 240, 18480, 6708240, 14088352320, 203200845886080, 23190071108511726720, 23647206583059346913915520, 239883631139512760372860490507520

Offset

0,3

Comments

Let triangular matrix T = A132986, then row n of T = row n-1 of T^n (shift right 1 column) with T(n,0)=T(n,1) for n>0.

Links

Table of n, a(n) for n=0..11.

Crossrefs

Cf. A132986.

Sequence in context: A257665 A132877 A007685 * A366350 A087046 A111403

Adjacent sequences: A132984 A132985 A132986 * A132988 A132989 A132990

Keyword

nonn

Author

Paul D. Hanna, Sep 07 2007

Status

approved