a(1) = 1, then the smallest number such that there are a(n) composite numbers between a(n) and a(n+1) both excluded.

A082280

a(1) = 1, then the smallest number such that there are a(n) composite numbers between a(n) and a(n+1) both excluded.

Terms

    a(0) =1a(1) =5a(2) =13a(3) =31a(4) =71a(5) =160a(6) =355a(7) =777a(8) =1681a(9) =3603a(10) =7677a(11) =16272a(12) =34323a(13) =72119a(14) =151036a(15) =315355a(16) =656823a(17) =1364925a(18) =2830706a(19) =5859765a(20) =12110519a(21) =24991695a(22) =51503762a(23) =106008953a(24) =217946295a(25) =447610014

External references