Primonacci numbers: a(n)=a(n-2)+a(n-3)+a(n-5)+a(n-7)+a(n-11)+...+a(n-p(k))+... until n <= p(k), where p(k) is the k-th prime. a(1)=a(2)=1.

A078465

Primonacci numbers: a(n)=a(n-2)+a(n-3)+a(n-5)+a(n-7)+a(n-11)+...+a(n-p(k))+... until n <= p(k), where p(k) is the k-th prime. a(1)=a(2)=1.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =2a(4) =2a(5) =4a(6) =5a(7) =8a(8) =12a(9) =16a(10) =26a(11) =36a(12) =55a(13) =81a(14) =118a(15) =177a(16) =257a(17) =384a(18) =564a(19) =833a(20) =1233a(21) =1813a(22) =2685a(23) =3956a(24) =5845a(25) =8629a(26) =12731a(27) =18807a(28) =27746a(29) =40976

External references