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A263509 as a simple table

na(n)
1360
278306
38349744
4830632993
577648070968
66600176727615
7524879929370969
839815156080534246
92908492519199212125
10206237888061029906090
1114285559566492289032473
12971180901984331067176513

[360,78306,8349744,830632993,77648070968,
 6600176727615,524879929370969,39815156080534246,
 2908492519199212125,206237888061029906090,
 14285559566492289032473,971180901984331067176513]