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A158875 as a simple table

na(n)
01
15
215
345
4107
5265
6615
71485
83227
97225
1015735
1135325
1275019
13163145
14348135
15761805
161589147
173374905
187077495
1915138045
2031390219
2166122825
22137816295
23292344525
24601532059
251253593145
262591401335
275435447805
2811157226763

[1,5,15,45,107,265,615,1485,3227,7225,15735,35325,
 75019,163145,348135,761805,1589147,3374905,
 7077495,15138045,31390219,66122825,137816295,
 292344525,601532059,1253593145,2591401335,
 5435447805,11157226763]