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A006553 as a simple table

na(n)
11
22
36
410
518
640
746
886
9118
10170
111172
121698
131810
142268
154338
1618362
1772662
1888392
1994110
20161538
21168660
22292340
23401208
24560750
251035092

[1,2,6,10,18,40,46,86,118,170,1172,1698,1810,2268,
 4338,18362,72662,88392,94110,161538,168660,292340,
 401208,560750,1035092]