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A002772 as a simple table

na(n)
22
36
422
5101
6546
73502
825586
9214062
101987516
1120599076
12232482372
132876191276
1438228128472
15549706132536
168408517839416
17137788390312712
182383879842920976
1943846851982943152
20846470648320690736
2117266870434276713616
22367937854493289655072

[2,6,22,101,546,3502,25586,214062,1987516,
 20599076,232482372,2876191276,38228128472,
 549706132536,8408517839416,137788390312712,
 2383879842920976,43846851982943152,
 846470648320690736,17266870434276713616,
 367937854493289655072]