A252924 - cp's OEIS frontend

A252924 Number of n X 2 nonnegative integer arrays with upper left 0 and lower right n+2-6 and value increasing by 0 or 1 with every step right or down.

n	a(n)
1	0
2	0
3	0
4	1
5	19
6	120
7	483
8	1500
9	3923
10	9069
11	19095
12	37356
13	68860
14	120835
15	203424
16	330525
17	520794
18	798830
19	1196562
20	1754859
21	2525385
22	3572722
23	4976785
24	6835554
25	9268149
26	12418275
27	16458065
28	21592350
29	28063386
30	36156069
31	46203670
32	58594123

[0, 0, 0, 1, 19, 120, 483, 1500, 3923, 9069, 19095, 37356, 68860, 120835, 203424, 330525, 520794, 798830, 1196562, 1754859, 2525385, 3572722, 4976785, 6835554, 9268149, 12418275, 16458065, 21592350, 28063386, 36156069, 46203670, 58594123]

cp's OEIS Frontend

A252924 Number of n X 2 nonnegative integer arrays with upper left 0 and lower right n+2-6 and value increasing by 0 or 1 with every step right or down.

Table of values

List of values