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A251907 as a simple table

na(n)
187472
21524496
331829596
4634891856
513021221976
6273455709590
75736244294410
8120526186216112
92541263626822798
1053645899122636266
111133356776834050890
1223966135822457282108
13507119909614017945682
1410735550087632824612072

[87472,1524496,31829596,634891856,13021221976,
 273455709590,5736244294410,120526186216112,
 2541263626822798,53645899122636266,
 1133356776834050890,23966135822457282108,
 507119909614017945682,10735550087632824612072]