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”).

A209758 as a simple table

na(n)
11
21
33
41
55
66
71
87
913
1012
111
129
1322
1432
1524
161
1711
1833
1963
2076
2148
221
2313
2446
25107
26170
27176
2896
291
3015
3161
32166
33321
34440
35400
36192
371
3817
3978
40242
41546
42912
431104
44896
45384
461
4719
4897
49337
50864
511683
522488
532704
541984
55768
561
5721
58118
59453
601296
612865

[1,1,3,1,5,6,1,7,13,12,1,9,22,32,24,1,11,33,63,76,
 48,1,13,46,107,170,176,96,1,15,61,166,321,440,400,
 192,1,17,78,242,546,912,1104,896,384,1,19,97,337,
 864,1683,2488,2704,1984,768,1,21,118,453,1296,
 2865]