b(n)*b(2*n), b(n) = A001353(n+1).A052209b(n)*b(2*n), b(n) = A001353(n+1).Terms a(0) =4a(1) =224a(2) =11700a(3) =608384a(4) =31625044a(5) =1643896800a(6) =85451019364External referencesoeis: A052209