a(0)=1; a(n) = lcm((number of earlier terms which are coprime to n), (sum of the earlier terms which are coprime to n)).
A128268
a(0)=1; a(n) = lcm((number of earlier terms which are coprime to n), (sum of the earlier terms which are coprime to n)).
Terms
- a(0) =1a(1) =1a(2) =2a(3) =12a(4) =2a(5) =90a(6) =2a(7) =770a(8) =2a(9) =5460a(10) =2a(11) =27870a(12) =2a(13) =86268a(14) =2a(15) =144a(16) =2a(17) =120632a(18) =2a(19) =4584054a(20) =2a(21) =1568502a(22) =2a(23) =147057998a(24) =2a(25) =1073923452a(26) =2a(27) =1324614852a(28) =2a(29) =74007713886
External references
- oeis: A128268