A151374 - cp's OEIS frontend

A151374 Number of walks within N^2 (the first quadrant of Z^2) starting at (0, 0), ending on the vertical axis and consisting of 2n steps taken from {(-1, -1), (-1, 0), (1, 1)}.

n	a(n)
0	1
1	2
2	8
3	40
4	224
5	1344
6	8448
7	54912
8	366080
9	2489344
10	17199104
11	120393728
12	852017152
13	6085836800
14	43818024960
15	317680680960
16	2317200261120
17	16992801914880
18	125210119372800
19	926554883358720
20	6882979133521920
21	51309480813527040
22	383705682605506560
23	2877792619541299200

[1, 2, 8, 40, 224, 1344, 8448, 54912, 366080, 2489344, 17199104, 120393728, 852017152, 6085836800, 43818024960, 317680680960, 2317200261120, 16992801914880, 125210119372800, 926554883358720, 6882979133521920, 51309480813527040, 383705682605506560, 2877792619541299200]

cp's OEIS Frontend

A151374 Number of walks within N^2 (the first quadrant of Z^2) starting at (0, 0), ending on the vertical axis and consisting of 2n steps taken from {(-1, -1), (-1, 0), (1, 1)}.

Table of values

List of values