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”).

A156074 as a simple table

na(n)
01
11
21
31
42
51
61
72
82
91
101
114
124
134
141
151
162
174
184
192
201
211
224
234
246
254
264
271
281
292
304
314
324
334
342
351
361
374
384
396
404
416
424
434
441
451
466
478
488
498
508
518
528
536
541
551
562
576
588
596
608
616
628
636
642
651
661
676
686
6910
7010
7110
7210
7310
7410
756
766
771
781
794
808
818
8210
8312
8410
8512
8610
878
888
894
901

[1,1,1,1,2,1,1,2,2,1,1,4,4,4,1,1,2,4,4,2,1,1,4,4,
 6,4,4,1,1,2,4,4,4,4,2,1,1,4,4,6,4,6,4,4,1,1,6,8,8,
 8,8,8,8,6,1,1,2,6,8,6,8,6,8,6,2,1,1,6,6,10,10,10,
 10,10,10,6,6,1,1,4,8,8,10,12,10,12,10,8,8,4,1]