A252870 - cp's OEIS frontend

A252870 Number of n X 2 nonnegative integer arrays with upper left 0 and lower right n+2-4 and value increasing by 0 or 1 with every step right or down.

n	a(n)
1	0
2	1
3	8
4	26
5	61
6	120
7	211
8	343
9	526
10	771
11	1090
12	1496
13	2003
14	2626
15	3381
16	4285
17	5356
18	6613
19	8076
20	9766
21	11705
22	13916
23	16423
24	19251
25	22426
26	25975
27	29926
28	34308
29	39151
30	44486
31	50345
32	56761
33	63768
34	71401
35	79696
36	88690
37	98421
38	108928
39	120251
40	132431
41	145510

[0, 1, 8, 26, 61, 120, 211, 343, 526, 771, 1090, 1496, 2003, 2626, 3381, 4285, 5356, 6613, 8076, 9766, 11705, 13916, 16423, 19251, 22426, 25975, 29926, 34308, 39151, 44486, 50345, 56761, 63768, 71401, 79696, 88690, 98421, 108928, 120251, 132431, 145510]

cp's OEIS Frontend

A252870 Number of n X 2 nonnegative integer arrays with upper left 0 and lower right n+2-4 and value increasing by 0 or 1 with every step right or down.

Table of values

List of values