Triangle T(n,k) = 3*T(n-1,k) + T(n-4,k-1) for k = 0..floor(n/4), with T(0,0) = 1 and T(n,k) = 0 for n or k < 0, read by rows.
A318773
Triangle T(n,k) = 3*T(n-1,k) + T(n-4,k-1) for k = 0..floor(n/4), with T(0,0) = 1 and T(n,k) = 0 for n or k < 0, read by rows.
Terms
- a(0) =1a(1) =3a(2) =9a(3) =27a(4) =81a(5) =1a(6) =243a(7) =6a(8) =729a(9) =27a(10) =2187a(11) =108a(12) =6561a(13) =405a(14) =1a(15) =19683a(16) =1458a(17) =9a(18) =59049a(19) =5103a(20) =54a(21) =177147a(22) =17496a(23) =270a(24) =531441a(25) =59049a(26) =1215a(27) =1a(28) =1594323a(29) =196830
External references
- oeis: A318773