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A236381 as a simple table

na(n)
11
21
34
42
564
659
71342
81076
94268
1010739
1164387
12818998
133226976
1426444853
1553155423
161175849126
1713396689992
182368807981
19907313696551
20483703442648
212835669288809
2298713800566163

[1,1,4,2,64,59,1342,1076,4268,10739,64387,818998,
 3226976,26444853,53155423,1175849126,13396689992,
 2368807981,907313696551,483703442648,
 2835669288809,98713800566163]