A025179 - cp's OEIS frontend

A025179 a(n) = number of (s(0), s(1), ..., s(n)) such that s(i) is an integer, s(0) = 0, |s(1)| = 1, |s(i) - s(i-1)| <= 1 for i >= 2, s(n) = 1. Also a(n) = T(n,n-1), where T is the array defined in A025177.

n	a(n)
2	1
3	4
4	10
5	29
6	81
7	231
8	659
9	1891
10	5443
11	15718
12	45508
13	132067
14	384047
15	1118820
16	3264642
17	9539787
18	27913083
19	81769236
20	239794422
21	703906719
22	2068153899
23	6081507831
24	17896695831
25	52703944965
26	155310270101
27	457956633826
28	1351132539604

[1, 4, 10, 29, 81, 231, 659, 1891, 5443, 15718, 45508, 132067, 384047, 1118820, 3264642, 9539787, 27913083, 81769236, 239794422, 703906719, 2068153899, 6081507831, 17896695831, 52703944965, 155310270101, 457956633826, 1351132539604]

cp's OEIS Frontend

A025179 a(n) = number of (s(0), s(1), ..., s(n)) such that s(i) is an integer, s(0) = 0, |s(1)| = 1, |s(i) - s(i-1)| <= 1 for i >= 2, s(n) = 1. Also a(n) = T(n,n-1), where T is the array defined in A025177.

Table of values

List of values