login

A031509 as a simple table

na(n)
1123
2127
3131
4139
5151
6163
7167
8488
9512
10520
11544
12608
13640
14672
151095
161167
171383
181455
191515
201944
212008
222136
232264
242456
252648
262696
273035
283115
293215
303235
313415
323515
333635
343715
353735
363835
373935
384115
394135
404215
414368
424944
435496
445943
455971

[123,127,131,139,151,163,167,488,512,520,544,608,
 640,672,1095,1167,1383,1455,1515,1944,2008,2136,
 2264,2456,2648,2696,3035,3115,3215,3235,3415,3515,
 3635,3715,3735,3835,3935,4115,4135,4215,4368,4944,
 5496,5943,5971]