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A211525 as a simple table

na(n)
18
214
324
444
580
6152
7288
8560
91088
102144
114224
128384
1316640
1433152
1566048
16131840
17263168
18525824
191050624
202100224
214198400
228394752
2316785408
2433566720
2567125248
26134242304
27268468224
28536920064
291073807360
302147581952
314295098368

[8,14,24,44,80,152,288,560,1088,2144,4224,8384,
 16640,33152,66048,131840,263168,525824,1050624,
 2100224,4198400,8394752,16785408,33566720,
 67125248,134242304,268468224,536920064,1073807360,
 2147581952,4295098368]