a(1)=1. a(n) = a(n-1)th integer from among those positive integers which do not occur earlier in the sequence and which are coprime to n.

A121219

a(1)=1. a(n) = a(n-1)th integer from among those positive integers which do not occur earlier in the sequence and which are coprime to n.

Terms

    a(0) =1a(1) =3a(2) =5a(3) =15a(4) =21a(5) =67a(6) =83a(7) =179a(8) =275a(9) =701a(10) =780a(11) =2359a(12) =2567a(13) =6011a(14) =11284a(15) =22593a(16) =24019a(17) =72089a(18) =76112a(19) =190311a(20) =333064a(21) =732773a(22) =766103a(23) =2298349a(24) =2872961a(25) =6224789a(26) =9337213a(27) =21786875a(28) =22565006a(29) =84618829

External references