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A033818 as a simple table

na(n)
13
25
39
414
522
634
753
883
9131
10208
11332
12532
13855
141377
152221
163586
175794
189366
1915145
2024495
2139623
2264100
23103704
24167784
25271467
26439229
27710673
281149878
291860526
303010378
314870877
327881227
3312752075
3420633272
3533385316
3654018556
3787403839
38141422361
39228826165
40370248490

[3,5,9,14,22,34,53,83,131,208,332,532,855,1377,
 2221,3586,5794,9366,15145,24495,39623,64100,
 103704,167784,271467,439229,710673,1149878,
 1860526,3010378,4870877,7881227,12752075,20633272,
 33385316,54018556,87403839,141422361,228826165,
 370248490]