Triangle read by rows: T(0,0) = 1; T(n,k) = T(n-1,k) + 7 * T(n-2,k-1) for k = 0..floor(n/2). T(n,k)=0 for n or k < 0.
A317016
Triangle read by rows: T(0,0) = 1; T(n,k) = T(n-1,k) + 7 * T(n-2,k-1) for k = 0..floor(n/2). T(n,k)=0 for n or k < 0.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =7a(4) =1a(5) =14a(6) =1a(7) =21a(8) =49a(9) =1a(10) =28a(11) =147a(12) =1a(13) =35a(14) =294a(15) =343a(16) =1a(17) =42a(18) =490a(19) =1372a(20) =1a(21) =49a(22) =735a(23) =3430a(24) =2401a(25) =1a(26) =56a(27) =1029a(28) =6860a(29) =12005
External references
- oeis: A317016