Counterexamples to the conjecture that an even, prime-indexed triangular plus 1 equals a prime or that an odd, prime-indexed triangular minus 2 equals a prime.

A097785

Counterexamples to the conjecture that an even, prime-indexed triangular plus 1 equals a prime or that an odd, prime-indexed triangular minus 2 equals a prime.

Terms

    a(0) =497a(1) =1771a(2) =2279a(3) =3161a(4) =3487a(5) =5149a(6) =5357a(7) =5993a(8) =6439a(9) =8129a(10) =9451a(11) =9731a(12) =11477a(13) =15049a(14) =16469a(15) =18337a(16) =19901a(17) =25879a(18) =26333a(19) =28681a(20) =29159a(21) =34717a(22) =40187a(23) =43069a(24) =48517a(25) =50401a(26) =54947a(27) =60379a(28) =61073a(29) =62479

External references