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A117437 as a simple table

na(n)
01
11
25
313
4105
5441
65165
730213
8469585
93529201
1068525525
11629401213
1214664091065
13159175688361
144326609913085
1554189700721013
161683369010256545
1723894940183997921
18835066388382183845
1913248060325188261613

[1,1,5,13,105,441,5165,30213,469585,3529201,
 68525525,629401213,14664091065,159175688361,
 4326609913085,54189700721013,1683369010256545,
 23894940183997921,835066388382183845,
 13248060325188261613]