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”).

A074972 as a simple table

na(n)
118
217
315
413
59
67
73
81
917
1011
119
123
1319
1417
1513
167
171
1819
1913
209
217
221
2317
2411
253
2619
2717
2813
2911
307
3113
329
333
341
3511
369
373
3817
3913
407
411
4219
439
447
453
461
479
4817
4913
5011
517
521
5319
549
553
5617
5711
589
593
6019
6117
627
6313
649
657
663
679
683
6913
7011
717
721
7313
747
751
7617
7711
783
7919
8011
811
8219
839
847
851

[18,17,15,13,9,7,3,1,17,11,9,3,19,17,13,7,1,19,13,
 9,7,1,17,11,3,19,17,13,11,7,13,9,3,1,11,9,3,17,13,
 7,1,19,9,7,3,1,9,17,13,11,7,1,19,9,3,17,11,9,3,19,
 17,7,13,9,7,3,9,3,13,11,7,1,13,7,1,17,11,3,19,11,
 1,19,9,7,1]