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A038111 as a simple table

na(n)
12
26
315
4105
5385
61001
717017
8323323
97436429
1019605131
1186822723
123212440751
13131710070791
145663533044013
15266186053068611
16613385252723321
172783825377744303
185855632691117327
19392327390304860909
2027855244711645124539
212033432863950094091347
22160641196252057433216413

[2,6,15,105,385,1001,17017,323323,7436429,
 19605131,86822723,3212440751,131710070791,
 5663533044013,266186053068611,613385252723321,
 2783825377744303,5855632691117327,
 392327390304860909,27855244711645124539,
 2033432863950094091347,160641196252057433216413]