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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”).

A024481 as a simple table

na(n)
11
22
37
411
527
644
796
8155
9307
10497
11947
121532
132752
144453
157783
1612593
1721421
1834660
1958128
2094053
21156357
22252991
23416571
24674026
251104546
261787193
272916749
284719399
297678589

[1,2,7,11,27,44,96,155,307,497,947,1532,2752,4453,
 7783,12593,21421,34660,58128,94053,156357,252991,
 416571,674026,1104546,1787193,2916749,4719399,
 7678589]