login

A199972 as a simple table

na(n)
10
20
34
49
519
629
741
855
971
1089
11109
12131
13155
14181
15209
16239
17271
18305
19341
20379
21419
22461
23505
24551
25599
26649
27701
28755
29811
30869
31929
32991
331055
341121
351189
361259
371331
381405
391481
401559
411639
421721
431805
441891
451979
462069

[0,0,4,9,19,29,41,55,71,89,109,131,155,181,209,
 239,271,305,341,379,419,461,505,551,599,649,701,
 755,811,869,929,991,1055,1121,1189,1259,1331,1405,
 1481,1559,1639,1721,1805,1891,1979,2069]