A011971 - cp's OEIS frontend

A011971 Aitken's array: triangle of numbers {a(n,k), n >= 0, 0 <= k <= n} read by rows, defined by a(0,0)=1, a(n,0) = a(n-1,n-1), a(n,k) = a(n,k-1) + a(n-1,k-1).

n	a(n)
0	1
1	1
2	2
3	2
4	3
5	5
6	5
7	7
8	10
9	15
10	15
11	20
12	27
13	37
14	52
15	52
16	67
17	87
18	114
19	151
20	203
21	203
22	255
23	322
24	409
25	523
26	674
27	877
28	877
29	1080
30	1335
31	1657
32	2066
33	2589
34	3263
35	4140
36	4140
37	5017
38	6097
39	7432
40	9089
41	11155
42	13744
43	17007
44	21147
45	21147
46	25287
47	30304
48	36401
49	43833
50	52922
51	64077
52	77821
53	94828
54	115975

[1, 1, 2, 2, 3, 5, 5, 7, 10, 15, 15, 20, 27, 37, 52, 52, 67, 87, 114, 151, 203, 203, 255, 322, 409, 523, 674, 877, 877, 1080, 1335, 1657, 2066, 2589, 3263, 4140, 4140, 5017, 6097, 7432, 9089, 11155, 13744, 17007, 21147, 21147, 25287, 30304, 36401, 43833, 52922, 64077, 77821, 94828, 115975]

cp's OEIS Frontend

A011971 Aitken's array: triangle of numbers {a(n,k), n >= 0, 0 <= k <= n} read by rows, defined by a(0,0)=1, a(n,0) = a(n-1,n-1), a(n,k) = a(n,k-1) + a(n-1,k-1).

Table of values

List of values