a(1)=2, a(2)=3; then a(n+1) = smallest k such that S(k) = S(a(n)) + S(a(n-1)), (n>=2), where S is sopfr (A001414).

A330988

a(1)=2, a(2)=3; then a(n+1) = smallest k such that S(k) = S(a(n)) + S(a(n-1)), (n>=2), where S is sopfr (A001414).

Terms

    a(0) =2a(1) =3a(2) =5a(3) =15a(4) =13a(5) =38a(6) =93a(7) =106a(8) =89a(9) =695a(10) =233a(11) =1492a(12) =1821a(13) =3932a(14) =1597a(15) =12895a(16) =16708a(17) =13526a(18) =76573a(19) =70828a(20) =28657a(21) =787967a(22) =1125255a(23) =4005507a(24) =6087997a(25) =10487301a(26) =514229a(27) =30784111a(28) =68658699a(29) =150301527

External references