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A153849 as a simple table

na(n)
11
21
34
440
5675
616023
7488264
818150408
9798091737
1040691618165
112372928554920
12156676126511294
1311619829396974162
14961567152709817189
1588268869225674860344
168941327301073770038304
17994670849523023025795108

[1,1,4,40,675,16023,488264,18150408,798091737,
 40691618165,2372928554920,156676126511294,
 11619829396974162,961567152709817189,
 88268869225674860344,8941327301073770038304,
 994670849523023025795108]