A087194 A(p)/2/p^2 where p runs through the odd primes different from 7 and A(k) is the k-th central heptanomial coefficient (A025012).

2, 29, 484398, 15667221, 19291710979, 716525463939, 1068605567805152, 70525663815429108660, 2926081151105727289330, 221376944251520543756333062