A344004 - cp's OEIS frontend

A344004 Number of ordered subsequences of {1,...,n} containing at least three elements and such that the first differences contain only odd numbers.

n	a(n)
1	0
2	0
3	1
4	3
5	8
6	17
7	34
8	63
9	113
10	196
11	334
12	560
13	930
14	1532
15	2511
16	4099
17	6674
18	10845
19	17600
20	28535
21	46235
22	74880
23	121236
24	196248
25	317628
26	514032
27	831829
28	1346043
29	2178068
30	3524321
31	5702614
32	9227175
33	14930045
34	24157492
35	39087826
36	63245624
37	102333774
38	165579740

[0, 0, 1, 3, 8, 17, 34, 63, 113, 196, 334, 560, 930, 1532, 2511, 4099, 6674, 10845, 17600, 28535, 46235, 74880, 121236, 196248, 317628, 514032, 831829, 1346043, 2178068, 3524321, 5702614, 9227175, 14930045, 24157492, 39087826, 63245624, 102333774, 165579740]

cp's OEIS Frontend

A344004 Number of ordered subsequences of {1,...,n} containing at least three elements and such that the first differences contain only odd numbers.

Table of values

List of values