A348595 - cp's OEIS frontend

A348595 Triangle read by rows: Number of walks from (0,0) to (3n,3k) on the square lattice with up and right steps where squares (x,y)=(1,1) mod 3 or (x,y)=(2,2) mod 3 are not entered.

n	a(n)
0	1
1	1
2	4
3	1
4	8
5	28
6	1
7	12
8	64
9	212
10	1
11	16
12	116
13	520
14	1676
15	1
16	20
17	184
18	1052
19	4288
20	13604
21	1
22	24
23	268
24	1872
25	9316
26	35784
27	112380
28	1
29	28
30	368
31	3044
32	17976
33	81708
34	301440
35	940020
36	1
37	32
38	484
39	4632
40	31740
41	167376
42	713940
43	2558280
44	7936620
45	1
46	36
47	616
48	6700
49	52336
50	314932
51	1531000
52	6231100
53	21842560
54	67494980

[1, 1, 4, 1, 8, 28, 1, 12, 64, 212, 1, 16, 116, 520, 1676, 1, 20, 184, 1052, 4288, 13604, 1, 24, 268, 1872, 9316, 35784, 112380, 1, 28, 368, 3044, 17976, 81708, 301440, 940020, 1, 32, 484, 4632, 31740, 167376, 713940, 2558280, 7936620, 1, 36, 616, 6700, 52336, 314932, 1531000, 6231100, 21842560, 67494980]

cp's OEIS Frontend

A348595 Triangle read by rows: Number of walks from (0,0) to (3n,3k) on the square lattice with up and right steps where squares (x,y)=(1,1) mod 3 or (x,y)=(2,2) mod 3 are not entered.

Table of values

List of values