login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

A034786 as a simple table

na(n)
11
21
31
42
53
67
712
831
959
10161
11329
12944
132067
146148
1514558
1644483
17116372

[1,1,1,2,3,7,12,31,59,161,329,944,2067,6148,14558,
 44483,116372]