login

A138750 as a simple table

na(n)
00
12
21
36
48
53
612
714
84
918
1020
116
1224
1326
147
1530
1632
179
1836
1938
2010
2142
2244
2312
2448
2550
2613
2754
2856
2915
3060
3162
3216
3366
3468
3518
3672
3774
3819
3978
4080
4121
4284
4386
4422
4590
4692
4724
4896
4998
5025
51102
52104
5327
54108
55110
5628
57114
58116
5930
60120
61122
6231
63126
64128
6533
66132
67134
6834

[0,2,1,6,8,3,12,14,4,18,20,6,24,26,7,30,32,9,36,
 38,10,42,44,12,48,50,13,54,56,15,60,62,16,66,68,
 18,72,74,19,78,80,21,84,86,22,90,92,24,96,98,25,
 102,104,27,108,110,28,114,116,30,120,122,31,126,
 128,33,132,134,34]