login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A089140
as a simple table
n
a(n)
1
2
2
4
3
8
4
15
5
26
6
40
7
60
8
84
9
114
10
149
11
190
12
234
13
288
14
346
15
411
16
484
17
565
18
649
19
743
20
840
21
947
22
1063
23
1185
[2,4,8,15,26,40,60,84,114,149,190,234,288,346,411, 484,565,649,743,840,947,1063,1185]