35872268domain: NAppears in sequencesa(n) = (5*3^(n-1)+1)/2.at n=15A057198a(1) = 1, then A007051 ((3^n)+1)/2 interleaved with A057198 (5*3^(n-1)+1)/2.at n=32A246360Row sums of A321624.at n=16A321573