A025572 a(n) = T(4n,n), where T is the array defined in A025564.

1, 4, 34, 330, 3381, 35700, 384307, 4193020, 46203670, 513011312, 5730482707, 64324536822, 724966763955, 8198552413800, 92985865982415, 1057267681773972, 12047638469222921, 137547814582468048, 1573060924386848400, 18017644508154675426, 206653990802794950415

Offset: 1

Author

Clark Kimberling

Keywords

• nonn

Extensions

More terms from Sean A. Irvine, Sep 07 2019