login

A146407 as a simple table

na(n)
11
21
31
41
51
61
71
81
917
1017
1153
1253
13413
14413
156475
166475
17139711
18139711
194765521
204765521
21251545591
22251545591
2321612521501

[1,1,1,1,1,1,1,1,17,17,53,53,413,413,6475,6475,
 139711,139711,4765521,4765521,251545591,251545591,
 21612521501]