A026083 - cp's OEIS frontend

A026083 a(n) = number of (s(0), s(1), ..., s(n)) such that every s(i) is an integer, s(0) = 0 = s(n), |s(i) - s(i-1)| = 1 for i = 1,2,3; |s(i) - s(i-1)| <= 1 for i >= 4. Also a(n) = T(n,n), where T is the array defined in A026082.

n	a(n)
4	6
5	12
6	38
7	104
8	300
9	856
10	2464
11	7104
12	20550
13	59580
14	173118
15	503960
16	1469546
17	4291644
18	12550290
19	36746592
20	107712306
21	316050372
22	928224594
23	2728494360
24	8026707864
25	23630376000
26	69614498268
27	205212650272
28	605292727450
29	1786351811556

[6, 12, 38, 104, 300, 856, 2464, 7104, 20550, 59580, 173118, 503960, 1469546, 4291644, 12550290, 36746592, 107712306, 316050372, 928224594, 2728494360, 8026707864, 23630376000, 69614498268, 205212650272, 605292727450, 1786351811556]

cp's OEIS Frontend

A026083 a(n) = number of (s(0), s(1), ..., s(n)) such that every s(i) is an integer, s(0) = 0 = s(n), |s(i) - s(i-1)| = 1 for i = 1,2,3; |s(i) - s(i-1)| <= 1 for i >= 4. Also a(n) = T(n,n), where T is the array defined in A026082.

Table of values

List of values