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A027956 as a simple table

na(n)
31
49
5175
61518
78735
839130
9148487
10502415
111568062
124622488
1313091798
1436067176
1597522270
16260459265
17690141333
181819657318
194783398669
2012551942930
2132903246829
2286201363911
23225761428636
24591165917888
251547848480940
264052529200192
2710609936578716
2827777538280521

[1,9,175,1518,8735,39130,148487,502415,1568062,
 4622488,13091798,36067176,97522270,260459265,
 690141333,1819657318,4783398669,12551942930,
 32903246829,86201363911,225761428636,591165917888,
 1547848480940,4052529200192,10609936578716,
 27777538280521]