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A264847 as a simple table

na(n)
00
11
23
36
410
516
624
734
846
960
1076
1194
12114
13137
14163
15192
16224
17259
18297
19338
20382
21429
22479
23532
24588
25647
26709
27774
28842
29913
30987
311064
321145
331230
341319
351412
361509
371610
381715
391824
401937
412054
422175
432300
442429
452562
462699
472840
482985
493134
503287
513444
523605
533770
543939

[0,1,3,6,10,16,24,34,46,60,76,94,114,137,163,192,
 224,259,297,338,382,429,479,532,588,647,709,774,
 842,913,987,1064,1145,1230,1319,1412,1509,1610,
 1715,1824,1937,2054,2175,2300,2429,2562,2699,2840,
 2985,3134,3287,3444,3605,3770,3939]