a(1) = 1, a(2) = 2; then a(n) = smallest number such that there are a(n-1) composite numbers between a(n) and a(n+1) exclusive.

A082281

a(1) = 1, a(2) = 2; then a(n) = smallest number such that there are a(n-1) composite numbers between a(n) and a(n+1) exclusive.

Terms

    a(0) =1a(1) =2a(2) =5a(3) =9a(4) =17a(5) =29a(6) =52a(7) =91a(8) =156a(9) =268a(10) =456a(11) =775a(12) =1309a(13) =2198a(14) =3696a(15) =6184a(16) =10347a(17) =17247a(18) =28740a(19) =47783a(20) =79377a(21) =131681a(22) =218222a(23) =361287a(24) =597587a(25) =987563a(26) =1630852a(27) =2691146a(28) =4437802a(29) =7313610

External references