A026069 - cp's OEIS frontend

A026069 a(n) = number of (s(0), s(1), ..., s(n)) such that every s(i) is an integer, s(0) = 0, |s(i) - s(i-1)| = 1 for i = 1,2; |s(i) - s(i-1)| <= 1 for i >= 3, s(n) = 2. Also a(n) = T(n,n-2), where T is the array defined in A024996.

n	a(n)
3	1
4	5
5	13
6	40
7	116
8	342
9	1002
10	2941
11	8629
12	25333
13	74405
14	218659
15	642955
16	1891683
17	5568867
18	16403283
19	48342867
20	142548639
21	420546039
22	1241293314
23	3665526270
24	10829045472
25	32005684340
26	94632148659
27	279909001851
28	828235716571
29	2451561077995

[1, 5, 13, 40, 116, 342, 1002, 2941, 8629, 25333, 74405, 218659, 642955, 1891683, 5568867, 16403283, 48342867, 142548639, 420546039, 1241293314, 3665526270, 10829045472, 32005684340, 94632148659, 279909001851, 828235716571, 2451561077995]

cp's OEIS Frontend

A026069 a(n) = number of (s(0), s(1), ..., s(n)) such that every s(i) is an integer, s(0) = 0, |s(i) - s(i-1)| = 1 for i = 1,2; |s(i) - s(i-1)| <= 1 for i >= 3, s(n) = 2. Also a(n) = T(n,n-2), where T is the array defined in A024996.

Table of values

List of values