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A251742 as a simple table

na(n)
00
10
20
31
40
50
60
70
81
92
104
118
1215
1330
1460
15120
16240
17479
18956
191908
203808
217601
2215172
2330284
2460448
25120656
26240833
27480710
28959512
291915216
303822831
317630490
3215230696
3330400944
3460681232
35121121631
36241762552
37482565592
38963215968
391922609105

[0,0,0,1,0,0,0,0,1,2,4,8,15,30,60,120,240,479,956,
 1908,3808,7601,15172,30284,60448,120656,240833,
 480710,959512,1915216,3822831,7630490,15230696,
 30400944,60681232,121121631,241762552,482565592,
 963215968,1922609105]