A274492 - cp's OEIS frontend

A274492 Number of horizontal segments of length 1 in all bargraphs of semiperimeter n (n>=2). By a horizontal segment of length 1 we mean a horizontal step that is not adjacent to any other horizontal step.

n	a(n)
2	1
3	1
4	5
5	16
6	52
7	170
8	556
9	1821
10	5973
11	19620
12	64536
13	212553
14	700903
15	2313864
16	7646670
17	25294673
18	83748689
19	277518319
20	920332567
21	3054319120
22	10143305864
23	33707066667
24	112078220233
25	372875904038
26	1241182355688
27	4133534991928
28	13772413826888
29	45908128269573

[1, 1, 5, 16, 52, 170, 556, 1821, 5973, 19620, 64536, 212553, 700903, 2313864, 7646670, 25294673, 83748689, 277518319, 920332567, 3054319120, 10143305864, 33707066667, 112078220233, 372875904038, 1241182355688, 4133534991928, 13772413826888, 45908128269573]

cp's OEIS Frontend

A274492 Number of horizontal segments of length 1 in all bargraphs of semiperimeter n (n>=2). By a horizontal segment of length 1 we mean a horizontal step that is not adjacent to any other horizontal step.

Table of values

List of values