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”).

A273221 as a simple table

na(n)
17
234
3200
4602
52530
64264
79792
813794
924794
1050344
1161690
12105672
13144320
14166754
15218362
16314184
17434594
18480680
19638242
20760410
21826944
221049594
231218274
241503744
251949312
262201800
272335834
282620002
292770344
303088064
314389882
324819490
335515072

[7,34,200,602,2530,4264,9792,13794,24794,50344,
 61690,105672,144320,166754,218362,314184,434594,
 480680,638242,760410,826944,1049594,1218274,
 1503744,1949312,2201800,2335834,2620002,2770344,
 3088064,4389882,4819490,5515072]