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A306687 as a simple table

na(n)
01
14
226
39
492
5474
616
7240
81704
98084
1025
11520
124879
1329560
14134450
1536
16994
1711928
1889928
19498140
202208612
2149
221736
2325956
24238440
251580810
268265432
2736024884
2864
292832
3051648
31568128
324442768
3327055808
34135873360
35584988840
3681
374380
3895733
391242648
4011320595
4179443000
42455434875
432220096240
449470766690

[1,4,26,9,92,474,16,240,1704,8084,25,520,4879,
 29560,134450,36,994,11928,89928,498140,2208612,49,
 1736,25956,238440,1580810,8265432,36024884,64,
 2832,51648,568128,4442768,27055808,135873360,
 584988840,81,4380,95733,1242648,11320595,79443000,
 455434875,2220096240,9470766690]