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A117189 as a simple table

na(n)
01
12
25
314
440
5114
6324
7920
82612
97416
1021056
1159784
12169744
13481952
141368400
153885280
1611031424
1731321376
1888930368
19252498816
20716916544
212035531648
225779458048
2316409538688
2446591385856
25132286304768
26375598753024
271066432564736
283027907856384

[1,2,5,14,40,114,324,920,2612,7416,21056,59784,
 169744,481952,1368400,3885280,11031424,31321376,
 88930368,252498816,716916544,2035531648,
 5779458048,16409538688,46591385856,132286304768,
 375598753024,1066432564736,3027907856384]