A047671 - cp's OEIS frontend

A047671 Square array a(n,k) read by antidiagonals: a(n,1)=1, a(1,k)=1, a(n,k) = 1 + a(n-1,k-1) + a(n-1,k) + a(n,k-1).

n	a(n)
1	1
2	1
3	1
4	1
5	4
6	1
7	1
8	7
9	7
10	1
11	1
12	10
13	19
14	10
15	1
16	1
17	13
18	37
19	37
20	13
21	1
22	1
23	16
24	61
25	94
26	61
27	16
28	1
29	1
30	19
31	91
32	193
33	193
34	91
35	19
36	1
37	1
38	22
39	127
40	346
41	481
42	346
43	127
44	22
45	1
46	1
47	25
48	169
49	565
50	1021
51	1021
52	565
53	169
54	25
55	1
56	1
57	28
58	217
59	862
60	1933
61	2524
62	1933
63	862

[1, 1, 1, 1, 4, 1, 1, 7, 7, 1, 1, 10, 19, 10, 1, 1, 13, 37, 37, 13, 1, 1, 16, 61, 94, 61, 16, 1, 1, 19, 91, 193, 193, 91, 19, 1, 1, 22, 127, 346, 481, 346, 127, 22, 1, 1, 25, 169, 565, 1021, 1021, 565, 169, 25, 1, 1, 28, 217, 862, 1933, 2524, 1933, 862]

cp's OEIS Frontend

A047671 Square array a(n,k) read by antidiagonals: a(n,1)=1, a(1,k)=1, a(n,k) = 1 + a(n-1,k-1) + a(n-1,k) + a(n,k-1).

Table of values

List of values