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”).

A229556 as a simple table

na(n)
11
21
31
41
52
61
71
83
93
101
111
124
1311
145
151
161
175
1825
1973
208
211
221
236
24137
252221
26749
2713
281
291
307
3149
32353777
331964654
3412657
3521
361
371
388
39363
4019595573
41786674809783
4214862065179
43343693
4434
451
461
479
48761
49239046803
5017003676861538314284
5113379715149864207035877
5235955580499839

[1,1,1,1,2,1,1,3,3,1,1,4,11,5,1,1,5,25,73,8,1,1,6,
 137,2221,749,13,1,1,7,49,353777,1964654,12657,21,
 1,1,8,363,19595573,786674809783,14862065179,
 343693,34,1,1,9,761,239046803,
 17003676861538314284,13379715149864207035877,
 35955580499839]