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A247956 as a simple table

na(n)
01
10
23
37
40
521
60
793
8217
9381
10651
110
122667
138191
1411811
1524573
1657337
1782677
18172011
19393213
20761763
211572861
222752491
235332341
2411010027
2521845397
2648758691
2785327221
28199753347
29341310837
30677207307
311398273429
323220807683
336192353757
3410836557067

[1,0,3,7,0,21,0,93,217,381,651,0,2667,8191,11811,
 24573,57337,82677,172011,393213,761763,1572861,
 2752491,5332341,11010027,21845397,48758691,
 85327221,199753347,341310837,677207307,1398273429,
 3220807683,6192353757,10836557067]