A094854 - cp's OEIS frontend

A094854 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) = 4, s(2n) = 4.

n	a(n)
0	1
1	2
2	6
3	20
4	69
5	241
6	846
7	2977
8	10490
9	36994
10	130532
11	460737
12	1626629
13	5743674
14	20283121
15	71632290
16	252989326
17	893528468
18	3155899165
19	11146628105
20	39370204614
21	139057473905
22	491159630010
23	1734810719530
24	6127485120996

[1, 2, 6, 20, 69, 241, 846, 2977, 10490, 36994, 130532, 460737, 1626629, 5743674, 20283121, 71632290, 252989326, 893528468, 3155899165, 11146628105, 39370204614, 139057473905, 491159630010, 1734810719530, 6127485120996]

cp's OEIS Frontend

A094854 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) = 4, s(2n) = 4.

Table of values

List of values