Smallest of two consecutive primes p and q, both ending with 1, such that q - p = 10n, or -1 if no such primes exist.

A380785

Smallest of two consecutive primes p and q, both ending with 1, such that q - p = 10n, or -1 if no such primes exist.

Terms

    a(0) =181a(1) =13421a(2) =4831a(3) =25261a(4) =95651a(5) =43331a(6) =175141a(7) =1060781a(8) =404851a(9) =1648081a(10) =2597981a(11) =6085441a(12) =22151281a(13) =10270451a(14) =25180321a(15) =79817581a(16) =84549821a(17) =135045091a(18) =306099181a(19) =529811591a(20) =164710681a(21) =707429491a(22) =965524181a(23) =391995431a(24) =428045491a(25) =1516828721a(26) =4272226951a(27) =2337682591

External references