A276902 - cp's OEIS frontend

A276902 Number of positive walks with n steps {-3,-2,-1,0,1,2,3} starting at the origin, ending at altitude 1, and staying strictly above the x-axis.

n	a(n)
0	0
1	1
2	3
3	12
4	56
5	284
6	1526
7	8530
8	49106
9	289149
10	1733347
11	10542987
12	64904203
13	403632551
14	2531971729
15	16002136283
16	101795589297
17	651286316903
18	4188174878517
19	27055199929042
20	175488689467350
21	1142479579205721
22	7462785088260791
23	48896570201100002

[0, 1, 3, 12, 56, 284, 1526, 8530, 49106, 289149, 1733347, 10542987, 64904203, 403632551, 2531971729, 16002136283, 101795589297, 651286316903, 4188174878517, 27055199929042, 175488689467350, 1142479579205721, 7462785088260791, 48896570201100002]

cp's OEIS Frontend

A276902 Number of positive walks with n steps {-3,-2,-1,0,1,2,3} starting at the origin, ending at altitude 1, and staying strictly above the x-axis.

Table of values

List of values