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”).

A139721 as a simple table

na(n)
18
25
31
46
50
61
715
82
917
1021
114
1219
133
147
1513
164
1727
1823
191
2018
210
2213
230
245
2523
263
278
287
290
301
3114
3212
3332
342
358
365
370
382
3913
4018
410
426
4310
449
453
466
4715
4811
4918
503
5110
520
532
540
5510
566
575
586
5915
607
619
626
6318
6415
6512
6613
671
6821
691
7010
7119
7225
739
749
7514
768
7715
782
797
8014
815
828
834
840
856
865
8712
881

[8,5,1,6,0,1,15,2,17,21,4,19,3,7,13,4,27,23,1,18,
 0,13,0,5,23,3,8,7,0,1,14,12,32,2,8,5,0,2,13,18,0,
 6,10,9,3,6,15,11,18,3,10,0,2,0,10,6,5,6,15,7,9,6,
 18,15,12,13,1,21,1,10,19,25,9,9,14,8,15,2,7,14,5,
 8,4,0,6,5,12,1]