A361190 - cp's OEIS frontend

A361190 Number of 4n-step lattice paths starting and ending at (0,0) that do not go above the diagonal x=y or below the x-axis using steps in {(1,1), (1,-1), (-1,0)}.

n	a(n)
0	1
1	1
2	9
3	153
4	3579
5	101630
6	3288871
7	116951012
8	4465824585
9	180310624841
10	7614208325878
11	333613510494834
12	15075162152856423
13	699290488810583617
14	33176816563410874752
15	1605135467691243954419
16	79003021319962788395355
17	3947913343912428255683930

[1, 1, 9, 153, 3579, 101630, 3288871, 116951012, 4465824585, 180310624841, 7614208325878, 333613510494834, 15075162152856423, 699290488810583617, 33176816563410874752, 1605135467691243954419, 79003021319962788395355, 3947913343912428255683930]

cp's OEIS Frontend

A361190 Number of 4n-step lattice paths starting and ending at (0,0) that do not go above the diagonal x=y or below the x-axis using steps in {(1,1), (1,-1), (-1,0)}.

Table of values

List of values