a(n) is the least perfect square average of two consecutive primes with 2*n gap between them, or -1 if no such number exists.

A360751

a(n) is the least perfect square average of two consecutive primes with 2*n gap between them, or -1 if no such number exists.

Terms

    a(0) =4a(1) =9a(2) =64a(3) =-1a(4) =144a(5) =625a(6) =324a(7) =2601a(8) =-1a(9) =154449a(10) =260100a(11) =1681a(12) =898704a(13) =27225a(14) =114244a(15) =-1a(16) =278784a(17) =223729a(18) =4410000a(19) =25281a(20) =12888100a(21) =4730625a(22) =1512900a(23) =4774225a(24) =-1a(25) =8208225a(26) =6130576a(27) =1121481a(28) =12744900a(29) =34586161

External references