login

A028770 as a simple table

na(n)
12
23
35
48
510
611
712
813
914
1015
1117
1218
1320
1421
1522
1623
1726
1827
1929
2031
2132
2233
2334
2435
2537
2638
2740
2841
2944
3046
3147
3248
3350
3451
3552
3653
3756

[2,3,5,8,10,11,12,13,14,15,17,18,20,21,22,23,26,
 27,29,31,32,33,34,35,37,38,40,41,44,46,47,48,50,
 51,52,53,56]