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A100541 as a simple table

na(n)
4-1
512
619
7-1
814
9-1
1028
1127
1223
1333
14-1
1535
16-1
1726
18-1
1945
2044
2144
2243
2329
2451
25-1
2654
27-1
2853
29-1
3032
31-1
3266
3365
3465
3564
3664
3763
3846
3973
40-1
4177
42-1
4376
44-1
4575
46-1
4750
48-1

[-1,12,19,-1,14,-1,28,27,23,33,-1,35,-1,26,-1,45,
 44,44,43,29,51,-1,54,-1,53,-1,32,-1,66,65,65,64,
 64,63,46,73,-1,77,-1,76,-1,75,-1,50,-1]