A346539 - cp's OEIS frontend

A346539 a(n) is the number of paths in the Z X Z grid joining (0,0) and (n,n) each of whose steps increases the Euclidean distance to the origin and has coordinates with absolute value at most 1.

n	a(n)
0	1
1	3
2	25
3	241
4	2545
5	28203
6	322681
7	3776275
8	44947503
9	542097295
10	6607714859
11	81247609095
12	1006335719467
13	12542292874825
14	157159924565801
15	1978517963096763
16	25010881408459855
17	317327992746937599
18	4039340709637022007
19	51569571332132589961
20	660140626022179390983

[1, 3, 25, 241, 2545, 28203, 322681, 3776275, 44947503, 542097295, 6607714859, 81247609095, 1006335719467, 12542292874825, 157159924565801, 1978517963096763, 25010881408459855, 317327992746937599, 4039340709637022007, 51569571332132589961, 660140626022179390983]

cp's OEIS Frontend

A346539 a(n) is the number of paths in the Z X Z grid joining (0,0) and (n,n) each of whose steps increases the Euclidean distance to the origin and has coordinates with absolute value at most 1.

Table of values

List of values