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”).

A005304 as a simple table

na(n)
12
22
34
410
518
632
758
898
9164
10274
11442
12704
131114
141730
152660
164058
176114
189136
1913554
2019930

[2,2,4,10,18,32,58,98,164,274,442,704,1114,1730,
 2660,4058,6114,9136,13554,19930]