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A228067 as a simple table

na(n)
15
224
3148
41068
58384
668998
7586290
85097291
945087026
10404206380
113663010786
1233489883880
13308457695529
142858876419882
1526639629409596
16249393772773269
172344318821362265
1822116397144079593
19209317713066531967
201986761935407441102

[5,24,148,1068,8384,68998,586290,5097291,45087026,
 404206380,3663010786,33489883880,308457695529,
 2858876419882,26639629409596,249393772773269,
 2344318821362265,22116397144079593,
 209317713066531967,1986761935407441102]