a(0)=1. For n >=1, a(n) = the smallest positive multiple of a(n-1) such that (the n-th prime)+a(n) is prime.

A175195

a(0)=1. For n >=1, a(n) = the smallest positive multiple of a(n-1) such that (the n-th prime)+a(n) is prime.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =2a(4) =4a(5) =8a(6) =16a(7) =80a(8) =160a(9) =480a(10) =480a(11) =960a(12) =960a(13) =3840a(14) =7680a(15) =7680a(16) =15360a(17) =92160a(18) =92160a(19) =92160a(20) =460800a(21) =1843200a(22) =3686400a(23) =3686400a(24) =55296000a(25) =940032000a(26) =1880064000a(27) =37601280000a(28) =37601280000a(29) =75202560000

External references