A026010 - cp's OEIS frontend

A026010 a(n) = number of (s(0), s(1), ..., s(n)) such that s(i) is a nonnegative integer and |s(i) - s(i-1)| = 1 for i = 1,2,...,n and s(0) = 2. Also a(n) = sum of numbers in row n+1 of array T defined in A026009.

n	a(n)
0	1
1	2
2	4
3	7
4	14
5	25
6	50
7	91
8	182
9	336
10	672
11	1254
12	2508
13	4719
14	9438
15	17875
16	35750
17	68068
18	136136
19	260338
20	520676
21	999362
22	1998724
23	3848222
24	7696444
25	14858000
26	29716000
27	57500460
28	115000920
29	222981435
30	445962870
31	866262915
32	1732525830
33	3370764540

[1, 2, 4, 7, 14, 25, 50, 91, 182, 336, 672, 1254, 2508, 4719, 9438, 17875, 35750, 68068, 136136, 260338, 520676, 999362, 1998724, 3848222, 7696444, 14858000, 29716000, 57500460, 115000920, 222981435, 445962870, 866262915, 1732525830, 3370764540]

cp's OEIS Frontend

A026010 a(n) = number of (s(0), s(1), ..., s(n)) such that s(i) is a nonnegative integer and |s(i) - s(i-1)| = 1 for i = 1,2,...,n and s(0) = 2. Also a(n) = sum of numbers in row n+1 of array T defined in A026009.

Table of values

List of values