The sum of the elements in the first, middle and last row of the n-th power of the 9-by-9 matrix defined in the formula.
A134326
The sum of the elements in the first, middle and last row of the n-th power of the 9-by-9 matrix defined in the formula.
Terms
- a(0) =3a(1) =11a(2) =34a(3) =112a(4) =359a(5) =1167a(6) =3764a(7) =12191a(8) =39391a(9) =127434a(10) =411973a(11) =1332290a(12) =4307638a(13) =13928919a(14) =45036841a(15) =145621921a(16) =470842799a(17) =1522389829a(18) =4922341763a(19) =15915370482a(20) =51458800352a(21) =166380151440a(22) =537950254595
External references
- oeis: A134326