Prime numbers occurring at integer Pythagorean distance (radius) from 1 in Ulam square prime-spiral. Primes on axes are excluded.

A078765

Prime numbers occurring at integer Pythagorean distance (radius) from 1 in Ulam square prime-spiral. Primes on axes are excluded.

Terms

    a(0) =227a(1) =239a(2) =271a(3) =997a(4) =1021a(5) =1061a(6) =2243a(7) =2251a(8) =2311a(9) =2339a(10) =2347a(11) =3527a(12) =4153a(13) =4217a(14) =6311a(15) =6491a(16) =6551a(17) =6971a(18) =9059a(19) =9109a(20) =9133a(21) =9341a(22) =9397a(23) =12671a(24) =14549a(25) =16273a(26) =16369a(27) =16529a(28) =19507a(29) =20551

External references