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A054454 as a simple table

na(n)
01
12
26
312
426
550
697
7180
8332
9600
101076
111908
123361
135878
1410226
1517700
1630510
1752390
1889665
19153000
20260376
21442032
22748776
231265832
242136001
253598250
266052062
2710164540
2817048642

[1,2,6,12,26,50,97,180,332,600,1076,1908,3361,
 5878,10226,17700,30510,52390,89665,153000,260376,
 442032,748776,1265832,2136001,3598250,6052062,
 10164540,17048642]