Smallest number m such that 2*m - p is composite for the first n primes p.

Terms

a(0) =3a(1) =6a(2) =15a(3) =49a(4) =49a(5) =49a(6) =49a(7) =110a(8) =154a(9) =154a(10) =278a(11) =278a(12) =278a(13) =278a(14) =496a(15) =496a(16) =496a(17) =496a(18) =496a(19) =496a(20) =1321a(21) =1321a(22) =1321a(23) =1321a(24) =1321a(25) =1321a(26) =2686a(27) =2686a(28) =2686a(29) =2686