706073841202domain: NAppears in sequencesa(0) = 1; a(n) = (5*3^(n-1) - 1)/2 for n > 0.at n=25A060816a(n) = ((2n+1)*3^n - 1)/2.at n=21A079272a(n) = (5*9^n - 1)/2.at n=12A255043Row sums of A321624.at n=25A321573