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A027720 as a simple table

na(n)
11
22
35
4101
5626
610001
71000001
81040401
92217122
105053505
11100000001
12101808101
1310000000001
1410182828101
1510408080401
1628053235082
171000000000001
181000400040001
191018262628101
207534662664357
21100000000000001
22100018000810001
23101826464628101

[1,2,5,101,626,10001,1000001,1040401,2217122,
 5053505,100000001,101808101,10000000001,
 10182828101,10408080401,28053235082,1000000000001,
 1000400040001,1018262628101,7534662664357,
 100000000000001,100018000810001,101826464628101]