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A263516 as a simple table

na(n)
153
22651
3158109
49051857
5529329240
630867389241
71805523575884
8105637731091773
96184312882582853
10362113871416827745
1121206150373034322027
121241958953411618737140
1372739454531341002993626

[53,2651,158109,9051857,529329240,30867389241,
 1805523575884,105637731091773,6184312882582853,
 362113871416827745,21206150373034322027,
 1241958953411618737140,72739454531341002993626]