A026135 - cp's OEIS frontend

A026135 Number of (s(0),s(1),...,s(n)) such that every s(i) is a nonnegative integer, s(0) = 1, |s(1) - s(0)| = 1, |s(i) - s(i-1)| <= 1 for i >= 2. Also sum of numbers in row n+1 of the array T defined in A026120.

n	a(n)
0	1
1	2
2	5
3	14
4	39
5	110
6	312
7	890
8	2550
9	7334
10	21161
11	61226
12	177575
13	516114
14	1502867
15	4383462
16	12804429
17	37452870
18	109682319
19	321563658
20	943701141
21	2772060618
22	8149661730
23	23978203662
24	70600640796
25	208014215066
26	613266903927

[1, 2, 5, 14, 39, 110, 312, 890, 2550, 7334, 21161, 61226, 177575, 516114, 1502867, 4383462, 12804429, 37452870, 109682319, 321563658, 943701141, 2772060618, 8149661730, 23978203662, 70600640796, 208014215066, 613266903927]

cp's OEIS Frontend

A026135 Number of (s(0),s(1),...,s(n)) such that every s(i) is a nonnegative integer, s(0) = 1, |s(1) - s(0)| = 1, |s(i) - s(i-1)| <= 1 for i >= 2. Also sum of numbers in row n+1 of the array T defined in A026120.

Table of values

List of values