A124862 a(n)=J(2n+1)*C(2n,n), J(n)=A001045(n).

1, 6, 66, 860, 11970, 172116, 2523444, 37487736, 562303170, 8496977060, 129153866556, 1972531074696, 30245473774516, 465314970745800, 7179145222818600, 111037445957810160, 1721080411744977090

Offset: 0

Author

Paul Barry, Nov 10 2006

Keywords

• easy
• nonn

Comments

Central coefficients of number triangle A124860.