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A001834 as a simple table

na(n)
01
15
219
371
4265
5989
63691
713775
851409
9191861
10716035
112672279
129973081
1337220045
14138907099
15518408351
161934726305
177220496869
1826947261171
19100568547815
20375326930089
211400739172541
225227629760075
2319509779867759
2472811489710961
25271736178976085

[1,5,19,71,265,989,3691,13775,51409,191861,716035,
 2672279,9973081,37220045,138907099,518408351,
 1934726305,7220496869,26947261171,100568547815,
 375326930089,1400739172541,5227629760075,
 19509779867759,72811489710961,271736178976085]