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A154808 as a simple table

na(n)
131
2992
331775
41016800
532537631
61041204192
733318534175
81066193093600
934118178995231
101091781727847392
1134937015291116575
121117984489315730400
1335775503658103372831
141144816117059307930592
1536634115745897853778975

[31,992,31775,1016800,32537631,1041204192,
 33318534175,1066193093600,34118178995231,
 1091781727847392,34937015291116575,
 1117984489315730400,35775503658103372831,
 1144816117059307930592,36634115745897853778975]