a(1)=1. a(n) = a(n-1) + (sum of the terms, from among terms a(1) through a(n-1), which are coprime to sum{k=1 to n-1} a(k)).
A131347
a(1)=1. a(n) = a(n-1) + (sum of the terms, from among terms a(1) through a(n-1), which are coprime to sum{k=1 to n-1} a(k)).
Terms
- a(0) =1a(1) =2a(2) =5a(3) =11a(4) =30a(5) =79a(6) =175a(7) =448a(8) =1199a(9) =2489a(10) =6928a(11) =18265a(12) =40489a(13) =110610a(14) =291341a(15) =645395a(16) =1633957a(17) =2615141a(18) =7207226a(19) =19135622a(20) =50845035a(21) =106938617a(22) =244812167a(23) =652656533a(24) =1686364826a(25) =3755787245a(26) =4816287969a(27) =12353991673a(28) =29473426455
External references
- oeis: A131347