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A264280 as a simple table

na(n)
18
232
3132
4556
52324
69724
740692
8170268
9712468
102981244
1112474676
1252198876
13218420308
14913955132
153824342132
1616002528156
1766960773524
18280189801724
191172422611892
204905870136668
2120528060064468
2285897351187644

[8,32,132,556,2324,9724,40692,170268,712468,
 2981244,12474676,52198876,218420308,913955132,
 3824342132,16002528156,66960773524,280189801724,
 1172422611892,4905870136668,20528060064468,
 85897351187644]