login

A047909 as a simple table

na(n)
11
21
31
41
55
61
71
819
947
101
111
1269
131306
14641
151
161
17251
1831451
19195709
2011389
211
221
23923
24729811
2546922017
2650775091
27248749
281
291
303431
3116928840
3210258694241
33162588279629
3420117051281
356439075
361
371
3812869
39397222288
402176464012941
41449363984934526
421077273394836829
4311260558754404
44192621953
451

[1,1,1,1,5,1,1,19,47,1,1,69,1306,641,1,1,251,
 31451,195709,11389,1,1,923,729811,46922017,
 50775091,248749,1,1,3431,16928840,10258694241,
 162588279629,20117051281,6439075,1,1,12869,
 397222288,2176464012941,449363984934526,
 1077273394836829,11260558754404,192621953,1]