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A247707 as a simple table

na(n)
01
11
25
350
46
5437
662
72
83270
9700
1036
1121720
125712
13506
1412
15160593
1648364
175444
18282
196
201209537
21425638
2257648
233836
24122
258999307
263578302
27576791
2848688
292226
3040
3166054288
3229550476
335500946
34558036
3533400
361056
3710
38485082083
39239927980
4050762537
416035146
42440480
4319180
44380

[1,1,5,50,6,437,62,2,3270,700,36,21720,5712,506,
 12,160593,48364,5444,282,6,1209537,425638,57648,
 3836,122,8999307,3578302,576791,48688,2226,40,
 66054288,29550476,5500946,558036,33400,1056,10,
 485082083,239927980,50762537,6035146,440480,19180,
 380]