Row n=3 of A283674.A283716Row n=3 of A283674.Terms a(0) =3a(1) =32a(2) =746a(3) =19748a(4) =531698a(5) =14349932a(6) =387424586a(7) =10460369588a(8) =282429602018External referencesoeis: A283716