A318301 - cp's OEIS frontend

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).

n	a(n)
0	1
1	1
2	1
3	2
4	3
5	5
6	10
7	18
8	33
9	61
10	122
11	234
12	450
13	867
14	1673
15	3346
16	6570
17	12906
18	25362
19	49857
20	98041
21	196082
22	388818
23	771066
24	1529226
25	3033090
26	6016323
27	11934605
28	23869210
29	47542338
30	94695858
31	188620650
32	275712074
33	748391058
34	1490765793
35	2969596981
36	5939193962
37	11854518714

[1, 1, 1, 2, 3, 5, 10, 18, 33, 61, 122, 234, 450, 867, 1673, 3346, 6570, 12906, 25362, 49857, 98041, 196082, 388818, 771066, 1529226, 3033090, 6016323, 11934605, 23869210, 47542338, 94695858, 188620650, 275712074, 748391058, 1490765793, 2969596981, 5939193962, 11854518714]

cp's OEIS Frontend

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).

Table of values

List of values