Least modulus k such that the multiplicative group modulo k is the direct product of n nontrivial cyclic groups.

A379423

Least modulus k such that the multiplicative group modulo k is the direct product of n nontrivial cyclic groups.

Terms

    a(0) =1a(1) =3a(2) =7a(3) =21a(4) =56a(5) =168a(6) =504a(7) =1736a(8) =5208a(9) =15624a(10) =57288a(11) =171864a(12) =671832a(13) =2234232a(14) =7390152a(15) =32023992a(16) =96071976a(17) =450799272a(18) =1559322072a(19) =5860390536a(20) =20271186936a(21) =95118646392a(22) =385152551784

External references