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A277720 as a simple table

na(n)
12320690177
217069520863233
342182344790209
465465530560001
53432376805760001
613322002122777601
720388795375960001
8129009714848870401
9580007888606160001
101096591987029196801
113029756968906340401
125806765663003468801
136213994663149504001
146367205158826803201
157802569551798000001
1610319507991273499201

[2320690177,17069520863233,42182344790209,
 65465530560001,3432376805760001,13322002122777601,
 20388795375960001,129009714848870401,
 580007888606160001,1096591987029196801,
 3029756968906340401,5806765663003468801,
 6213994663149504001,6367205158826803201,
 7802569551798000001,10319507991273499201]