A038735 T(n,n-6), array T as in A038730.
1, 14, 107, 593, 2673, 10429, 36622, 118885, 363791, 1064866, 3015563, 8334539, 22634700, 60713627, 161467437, 426957444, 1124716630, 2955628731, 7755292673, 20330279298, 53265590236, 139510843575, 365331452729
Offset: 6