Least primes p1 such that gap between p1 and p2=nextprime(p1) contains no semiprimes. Gap is 1 for n=0 (first term) and 2n for n=1..30.

A136344

Least primes p1 such that gap between p1 and p2=nextprime(p1) contains no semiprimes. Gap is 1 for n=0 (first term) and 2n for n=1..30.

Terms

    a(0) =2a(1) =11a(2) =97a(3) =601a(4) =6473a(5) =2521a(6) =35117a(7) =63113a(8) =39343a(9) =104659a(10) =705053a(11) =512821a(12) =1123279a(13) =4357781a(14) =4942711a(15) =4808987a(16) =5922317a(17) =32995057a(18) =105484481a(19) =37212113a(20) =108525829a(21) =335433389a(22) =598559963a(23) =789565537a(24) =864056573a(25) =1913815493a(26) =2311939579

External references