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A251281 as a simple table

na(n)
1131421696
21071238805248
38731180080790272
471150650646356529216
5579798390712632340647936
64724687679127024503784365440
738500708396868195909229905732096
8313735908205564473863325105791912960

[131421696,1071238805248,8731180080790272,
 71150650646356529216,579798390712632340647936,
 4724687679127024503784365440,
 38500708396868195909229905732096,
 313735908205564473863325105791912960]