login

A147053 as a simple table

na(n)
11
21
31
41
51
61
71
81
917
1017
1149
1249
13237
14237
153143
163143
1761525
1861525
191581763
201581763
2152804881
2252804881

[1,1,1,1,1,1,1,1,17,17,49,49,237,237,3143,3143,
 61525,61525,1581763,1581763,52804881,52804881]