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”).

A097688 as a simple table

na(n)
11
22
32
43
53
63
73
83
94
104
114
125
135
145
155
165
175
185
195
205
215
225
236
246
256
266
276
286
296
306
316
326
336
346
356
367
377
387
397
407
417
427
437
447
457
467
477
487
498
508
518
528
539
549
559
569
579
589
599
609
619
629
639
649
659
669
679
689
699
709
7110
7210
7310
7410
7510
7610
7710
7810
7910
8010
8110
8210
8310
8410
8510
8610
8710
8810
8910
9010
9110
9210
9310

[1,2,2,3,3,3,3,3,4,4,4,5,5,5,5,5,5,5,5,5,5,5,6,6,
 6,6,6,6,6,6,6,6,6,6,6,7,7,7,7,7,7,7,7,7,7,7,7,7,8,
 8,8,8,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,10,10,
 10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,
 10,10,10,10,10]