A026880 - cp's OEIS frontend

A026880 a(n) = T(n,m) + T(n,m+1) + ... + T(n,n), m=[ (n+1)/2 ], T given by A026758.

n	a(n)
1	1
2	1
3	3
4	4
5	12
6	17
7	50
8	73
9	212
10	315
11	909
12	1365
13	3931
14	5940
15	17122
16	25960
17	75053
18	113951
19	330917
20	502399
21	1467067
22	2224888
23	6537922
24	9896852
25	29281109
26	44218651
27	131765882
28	198432519
29	595663485
30	894311205
31	2704572795

[1, 1, 3, 4, 12, 17, 50, 73, 212, 315, 909, 1365, 3931, 5940, 17122, 25960, 75053, 113951, 330917, 502399, 1467067, 2224888, 6537922, 9896852, 29281109, 44218651, 131765882, 198432519, 595663485, 894311205, 2704572795]

cp's OEIS Frontend

A026880 a(n) = T(n,m) + T(n,m+1) + ... + T(n,n), m=[ (n+1)/2 ], T given by A026758.

Table of values

List of values