A347947 - cp's OEIS frontend

A347947 Number of walks on square lattice from (1,n) to (0,0) using steps that decrease the Euclidean distance to the origin and increase the Euclidean distance to (n,1) and that change each coordinate by at most 1.

n	a(n)
0	1
1	3
2	5
3	24
4	81
5	298
6	1070
7	3868
8	13960
9	50417
10	182084
11	657707
12	2375894
13	8583264
14	31009890
15	112038032
16	404803299
17	1462624643
18	5284813128
19	19095564020
20	68998567080
21	249316670981
22	900876831495
23	3255230444720
24	11762504284218
25	42502963168784
26	153581776819904

[1, 3, 5, 24, 81, 298, 1070, 3868, 13960, 50417, 182084, 657707, 2375894, 8583264, 31009890, 112038032, 404803299, 1462624643, 5284813128, 19095564020, 68998567080, 249316670981, 900876831495, 3255230444720, 11762504284218, 42502963168784, 153581776819904]

cp's OEIS Frontend

A347947 Number of walks on square lattice from (1,n) to (0,0) using steps that decrease the Euclidean distance to the origin and increase the Euclidean distance to (n,1) and that change each coordinate by at most 1.

Table of values

List of values