a(n) is the least multiple of n such that a(n) = 1 mod k for all integers k with 1 < k < n and k relatively prime to n.

A055006

a(n) is the least multiple of n such that a(n) = 1 mod k for all integers k with 1 < k < n and k relatively prime to n.

Terms

    a(0) =1a(1) =2a(2) =3a(3) =4a(4) =25a(5) =6a(6) =301a(7) =736a(8) =2241a(9) =190a(10) =25201a(11) =4236a(12) =83161a(13) =19306a(14) =64065a(15) =135136a(16) =7207201a(17) =85086a(18) =49008961a(19) =49468420a(20) =36951201a(21) =27776386a(22) =698377681a(23) =855189336a(24) =25700298625a(25) =2445441076a(26) =74364290001a(27) =13624600276a(29) =6254036790

External references