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A180275 as a simple table

na(n)
15
237
3757
41031
52237
66917
722037
827091
936037
10117797
11157627
12166541
13262337
14422101
15474787
16493277
17729271
181643387
191728361
201906997
212147077
222460781
232628487
242686037
253242237
263375451
274020157
284742137
295268547
305359901

[5,37,757,1031,2237,6917,22037,27091,36037,117797,
 157627,166541,262337,422101,474787,493277,729271,
 1643387,1728361,1906997,2147077,2460781,2628487,
 2686037,3242237,3375451,4020157,4742137,5268547,
 5359901]