A026029 - cp's OEIS frontend

A026029 Number of (s(0), s(1), ..., s(2n)) such that s(i) is a nonnegative integer and |s(i) - s(i-1)| = 1 for i = 1,2,...,n, s(0) = 3, s(2n) = 3. Also T(2n,n), where T is defined in A026022.

n	a(n)
0	1
1	2
2	6
3	20
4	69
5	242
6	858
7	3068
8	11050
9	40052
10	145996
11	534888
12	1968685
13	7276050
14	26993490
15	100490220
16	375287550
17	1405622460
18	5278838100
19	19873977240
20	74994427170
21	283595947284
22	1074568266756
23	4079184055640
24	15511924233204
25	59083160374952
26	225384613313944

[1, 2, 6, 20, 69, 242, 858, 3068, 11050, 40052, 145996, 534888, 1968685, 7276050, 26993490, 100490220, 375287550, 1405622460, 5278838100, 19873977240, 74994427170, 283595947284, 1074568266756, 4079184055640, 15511924233204, 59083160374952, 225384613313944]

cp's OEIS Frontend

A026029 Number of (s(0), s(1), ..., s(2n)) such that s(i) is a nonnegative integer and |s(i) - s(i-1)| = 1 for i = 1,2,...,n, s(0) = 3, s(2n) = 3. Also T(2n,n), where T is defined in A026022.

Table of values

List of values