login

A214880 as a simple table

na(n)
11
22
34
44
55
66
77
88
99
1010
1111
1212
1317
1414
1515
1618
1717
1818
1919
2020
2121
2222
2323
2424
2525
2626
2727
2829
2929
3030
3133
3233
3333
3435
3535
3636
3737
3838
3940
4040
4141
4242
4343
4444
4545
4646
4747
4848
4950
5051
5154
5254
5354
5454
5555
5656
5757
5858
5959
6061
6161
6263
6363
6466
6566
6666
6767

[1,2,4,4,5,6,7,8,9,10,11,12,17,14,15,18,17,18,19,
 20,21,22,23,24,25,26,27,29,29,30,33,33,33,35,35,
 36,37,38,40,40,41,42,43,44,45,46,47,48,50,51,54,
 54,54,54,55,56,57,58,59,61,61,63,63,66,66,66,67]