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A147834 as a simple table

na(n)
01
11
25
321
453
5197
6661
72085
87093
923365
1076757
11255333
12842741
132785157
149220117
1530473637
16100775989
17333311941
181102099541
193644659173
2012052800629
2139856631813
22131803744405
23435863879205
241441358438581
254766458888261
2615762259193045
2752124396009061

[1,1,5,21,53,197,661,2085,7093,23365,76757,255333,
 842741,2785157,9220117,30473637,100775989,
 333311941,1102099541,3644659173,12052800629,
 39856631813,131803744405,435863879205,
 1441358438581,4766458888261,15762259193045,
 52124396009061]