A094828 - cp's OEIS frontend

A094828 Number of (s(0), s(1), ..., s(2n)) such that 0 < s(i) < 9 and |s(i) - s(i-1)| = 1 for i = 1,2,...,2n, s(0) = 1, s(2n) = 5.

n	a(n)
2	1
3	5
4	20
5	75
6	274
7	988
8	3536
9	12597
10	44745
11	158632
12	561683
13	1987154
14	7026408
15	24835744
16	87763945
17	310088381
18	1095490524
19	3869911659
20	13670143618
21	48287147300
22	170561502896
23	602454835293
24	2127962632993
25	7516243783216

[1, 5, 20, 75, 274, 988, 3536, 12597, 44745, 158632, 561683, 1987154, 7026408, 24835744, 87763945, 310088381, 1095490524, 3869911659, 13670143618, 48287147300, 170561502896, 602454835293, 2127962632993, 7516243783216]

cp's OEIS Frontend

A094828 Number of (s(0), s(1), ..., s(2n)) such that 0 < s(i) < 9 and |s(i) - s(i-1)| = 1 for i = 1,2,...,2n, s(0) = 1, s(2n) = 5.

Table of values

List of values