Triangle T(n, k) read by rows: T(0, 0) = 1 and T(n, k) = Sum_{i=0..k-1} T(n, i) + Sum_{i=k..n-1} T(n-1, i).
A318301
Triangle T(n, k) read by rows: T(0, 0) = 1 and T(n, k) = Sum_{i=0..k-1} T(n, i) + Sum_{i=k..n-1} T(n-1, i).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =2a(4) =3a(5) =5a(6) =10a(7) =18a(8) =33a(9) =61a(10) =122a(11) =234a(12) =450a(13) =867a(14) =1673a(15) =3346a(16) =6570a(17) =12906a(18) =25362a(19) =49857a(20) =98041a(21) =196082a(22) =388818a(23) =771066a(24) =1529226a(25) =3033090a(26) =6016323a(27) =11934605a(28) =23869210a(29) =47542338
External references
- oeis: A318301