a(n) = a(n-1) + 2^(k(n)), where k(n) is the n-th term of the sequence formed by k(1)=0 together with the numbers A042964.
A113876
a(n) = a(n-1) + 2^(k(n)), where k(n) is the n-th term of the sequence formed by k(1)=0 together with the numbers A042964.
Terms
- a(0) =1a(1) =5a(2) =13a(3) =77a(4) =205a(5) =1229a(6) =3277a(7) =19661a(8) =52429a(9) =314573a(10) =838861a(11) =5033165a(12) =13421773a(13) =80530637a(14) =214748365a(15) =1288490189a(16) =3435973837a(17) =20615843021a(18) =54975581389a(19) =329853488333a(20) =879609302221
External references
- oeis: A113876