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”).

A210688 as a simple table

na(n)
11
22
33
48
54
64
73
81
94
107
116
125
1316
148
156
169
1710
184
1912
207
218
2217
232
241
259
263
278
285
294
305
3117
326
338
3426
355
3618
3720
386
3914
4013
417
428
4318
4419
459
467
478
484
491
504
5123
525
534
549
5532
5615
5711
587
5910
6012
6127
6213
6320
6422
6533
6611
6710
6811
692
7032
719
728
7319
743
759
7617
7712

[1,2,3,8,4,4,3,1,4,7,6,5,16,8,6,9,10,4,12,7,8,17,
 2,1,9,3,8,5,4,5,17,6,8,26,5,18,20,6,14,13,7,8,18,
 19,9,7,8,4,1,4,23,5,4,9,32,15,11,7,10,12,27,13,20,
 22,33,11,10,11,2,32,9,8,19,3,9,17,12]