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”).

A275507 as a simple table

na(n)
148
2200
31168
47140
543780
6268152
71643372
810069540
961703488
10378096660
112316847540
1214196847960
1386993404476
14533065762516
153266444015616
1620015648328132
17122649024958372
18751551142797496
194605247533843404

[48,200,1168,7140,43780,268152,1643372,10069540,
 61703488,378096660,2316847540,14196847960,
 86993404476,533065762516,3266444015616,
 20015648328132,122649024958372,751551142797496,
 4605247533843404]