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A140618 as a simple table

na(n)
123
247
3191
4239
5263
6311
7359
8479
9503
10647
11719
121031
131103
141151
151223
161487
171559
181583
191607
201847
211871
222039
232063
242087
252399
262543
272591
282927
292999
303407
313671
323767
333863
343911
354007
364127
374463
384583
394679
404751
414799
424871

[23,47,191,239,263,311,359,479,503,647,719,1031,
 1103,1151,1223,1487,1559,1583,1607,1847,1871,2039,
 2063,2087,2399,2543,2591,2927,2999,3407,3671,3767,
 3863,3911,4007,4127,4463,4583,4679,4751,4799,4871]