A026070 - cp's OEIS frontend

A026070 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) = 3. Also a(n) = T(n,n-3), where T is the array defined in A024996.

n	a(n)
3	1
4	2
5	8
6	24
7	76
8	232
9	707
10	2136
11	6429
12	19282
13	57695
14	172316
15	513955
16	1531362
17	4559271
18	13566288
19	40349619
20	119972214
21	356634978
22	1059985776
23	3150165270
24	9361450868
25	27819215185
26	82670528056
27	245680350995
28	730149455646
29	2170105711452

[1, 2, 8, 24, 76, 232, 707, 2136, 6429, 19282, 57695, 172316, 513955, 1531362, 4559271, 13566288, 40349619, 119972214, 356634978, 1059985776, 3150165270, 9361450868, 27819215185, 82670528056, 245680350995, 730149455646, 2170105711452]

cp's OEIS Frontend

A026070 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) = 3. Also a(n) = T(n,n-3), where T is the array defined in A024996.

Table of values

List of values