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A268553 as a simple table

na(n)
01
136
28100
32822400
41200622500
5572679643536
6294230074634496
7159259227403161600
889595913068008532900
951926300783585192250000
1030813565377466975498995600
1118639620490164944744006041600
1211456409104219869032980449440000

[1,36,8100,2822400,1200622500,572679643536,
 294230074634496,159259227403161600,
 89595913068008532900,51926300783585192250000,
 30813565377466975498995600,
 18639620490164944744006041600,
 11456409104219869032980449440000]