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A127679 as a simple table

na(n)
11
21
31
41
52
64
76
815
935
10119
11221
121703
1331571
14444163
1562571693
1616130221953
1731653658032799
181139752929797333269
19190765682365696256860989
2013391304481955883169111997465697

[1,1,1,1,2,4,6,15,35,119,221,1703,31571,444163,
 62571693,16130221953,31653658032799,
 1139752929797333269,190765682365696256860989,
 13391304481955883169111997465697]