a(n) = row sum of triangle whose n-th row begins with n and contains n-1 smallest numbers coprime to n and greater than n.

A081501

a(n) = row sum of triangle whose n-th row begins with n and contains n-1 smallest numbers coprime to n and greater than n.

Terms

    a(0) =1a(1) =5a(2) =12a(3) =25a(4) =35a(5) =73a(6) =70a(7) =113a(8) =129a(9) =201a(10) =176a(11) =325a(12) =247a(13) =393a(14) =408a(15) =481a(16) =425a(17) =757a(18) =532a(19) =851a(20) =789a(21) =969a(22) =782a(23) =1369a(24) =985a(25) =1353a(26) =1236a(27) =1633a(28) =1247a(29) =2479

External references