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A003453 as a simple table

na(n)
51
63
76
811
917
1026
1136
1250
1365
1485
15106
16133
17161
18196
19232
20276
21321
22375
23430
24495
25561
26638
27716
28806
29897
301001
311106
321225
331345
341480
351616
361768
371921
382091
392262
402451
412641
422850
433060
443290
453521
463773
474026

[1,3,6,11,17,26,36,50,65,85,106,133,161,196,232,
 276,321,375,430,495,561,638,716,806,897,1001,1106,
 1225,1345,1480,1616,1768,1921,2091,2262,2451,2641,
 2850,3060,3290,3521,3773,4026]