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A249588 as a simple table

na(n)
01
11
25
349
4856
522376
6842536
742409480
82782192064
9229357803456
1023289083584704
112851295406197184
12414855423241758720
1370695451937596732416
1413958230719814052097024
153159974451734082088897536
16813380358295803762813321216
17236172126115504055456155975680

[1,1,5,49,856,22376,842536,42409480,2782192064,
 229357803456,23289083584704,2851295406197184,
 414855423241758720,70695451937596732416,
 13958230719814052097024,3159974451734082088897536,
 813380358295803762813321216,
 236172126115504055456155975680]