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A260363 as a simple table

na(n)
148
278
3208
4436
5616
61378
72880
84904
99776
1019458
1135928
1270096
13136184
14257558
15498984
16963740
171839600
183547926
196837184
2013109580
2125236616
2248572826
2393304016
24179507232
25345319152
26663776330
271276734024
282455611208
294721490968

[48,78,208,436,616,1378,2880,4904,9776,19458,
 35928,70096,136184,257558,498984,963740,1839600,
 3547926,6837184,13109580,25236616,48572826,
 93304016,179507232,345319152,663776330,1276734024,
 2455611208,4721490968]