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A054440 as a simple table

na(n)
01
10
22
34
412
516
648
760
8148
9220
10438
11618
121302
131740
143216
154788
168170
1711512
1819862
1927570
2045448
2164600
22100808
23141724
24223080
25307512
26465736
27652518
28968180
291334030
301972164
312691132
323902432
335347176
347611484
3510358426
3614697028
3719790508
3827691500

[1,0,2,4,12,16,48,60,148,220,438,618,1302,1740,
 3216,4788,8170,11512,19862,27570,45448,64600,
 100808,141724,223080,307512,465736,652518,968180,
 1334030,1972164,2691132,3902432,5347176,7611484,
 10358426,14697028,19790508,27691500]