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A138292 as a simple table

na(n)
01
11
21
37
425
5121
6841
79871
880977
9869905
1010776241
11131366071
121821918121
1327671299657
14460068491065
158716820294911
16162728020119841
173217989767498401
1869343322972016097
191533322325194196455

[1,1,1,7,25,121,841,9871,80977,869905,10776241,
 131366071,1821918121,27671299657,460068491065,
 8716820294911,162728020119841,3217989767498401,
 69343322972016097,1533322325194196455]