Primes of the form k(k+1)/2+1 (i.e., central polygonal numbers, or one more than triangular numbers).

A055469

Primes of the form k(k+1)/2+1 (i.e., central polygonal numbers, or one more than triangular numbers).

Terms

    a(0) =2a(1) =7a(2) =11a(3) =29a(4) =37a(5) =67a(6) =79a(7) =137a(8) =191a(9) =211a(10) =277a(11) =379a(12) =631a(13) =821a(14) =947a(15) =991a(16) =1129a(17) =1327a(18) =1597a(19) =1831a(20) =2017a(21) =2081a(22) =2347a(23) =2557a(24) =2851a(25) =2927a(26) =3571a(27) =3917a(28) =4561a(29) =4657

External references