Primes on axis of Ulam square spiral (with rows ... / 7 8 9 / 6 1 2 / 5 4 3 / ... ) with origin at (1).

A078784

Primes on axis of Ulam square spiral (with rows ... / 7 8 9 / 6 1 2 / 5 4 3 / ... ) with origin at (1).

Terms

    a(0) =2a(1) =11a(2) =19a(3) =23a(4) =53a(5) =61a(6) =127a(7) =139a(8) =151a(9) =163a(10) =233a(11) =281a(12) =431a(13) =541a(14) =613a(15) =743a(16) =827a(17) =977a(18) =1009a(19) =1279a(20) =1621a(21) =1871a(22) =2003a(23) =2281a(24) =2377a(25) =2731a(26) =3109a(27) =3221a(28) =3511a(29) =3571

External references