A025182 - cp's OEIS frontend

A025182 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) = 4. Also a(n) = T(n,n-4), where T is the array defined in A025177.

n	a(n)
4	1
5	4
6	16
7	56
8	189
9	616
10	1968
11	6192
12	19272
13	59488
14	182468
15	556920
16	1693146
17	5131296
18	15511344
19	46791072
20	140905197
21	423709956
22	1272596136
23	3818355464
24	11447074309
25	34292702840
26	102670377120
27	307230479920
28	918951019155
29	2747624937876

[1, 4, 16, 56, 189, 616, 1968, 6192, 19272, 59488, 182468, 556920, 1693146, 5131296, 15511344, 46791072, 140905197, 423709956, 1272596136, 3818355464, 11447074309, 34292702840, 102670377120, 307230479920, 918951019155, 2747624937876]

cp's OEIS Frontend

A025182 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) = 4. Also a(n) = T(n,n-4), where T is the array defined in A025177.

Table of values

List of values