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A002527 as a simple table

na(n)
00
11
22
36
418
560
6184
7560
81695
95200
1015956
1148916
12149664
13458048
141402360
154294417
1613149210
1740259178
18123260854
19377395940
201155508592
213537919648
2210832298239
2333165996032
24101546731816
25310913195800
26951945967120
272914642812096
288923975209168

[0,1,2,6,18,60,184,560,1695,5200,15956,48916,
 149664,458048,1402360,4294417,13149210,40259178,
 123260854,377395940,1155508592,3537919648,
 10832298239,33165996032,101546731816,310913195800,
 951945967120,2914642812096,8923975209168]