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A015486 as a simple table

na(n)
01
12
25
325
4225
53825
6126225
78204625
81058396625
9272007932625
10139540069436625
11143028571172540625
12293065542332535740625
131200689526936398929340625
149837249294189916428087740625
15161183329685301780674217630140625

[1,2,5,25,225,3825,126225,8204625,1058396625,
 272007932625,139540069436625,143028571172540625,
 293065542332535740625,1200689526936398929340625,
 9837249294189916428087740625,
 161183329685301780674217630140625]