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A236445 as a simple table

na(n)
1256
22116
317258
4136208
51080984
68564392
767897642
8538065184
94265291002
1033804568568
11267953875076
122123741832432
1316833511636310
14133421518052528
151057529601925106
168382006062940352
1766437217185516568
18526585866692093976

[256,2116,17258,136208,1080984,8564392,67897642,
 538065184,4265291002,33804568568,267953875076,
 2123741832432,16833511636310,133421518052528,
 1057529601925106,8382006062940352,
 66437217185516568,526585866692093976]