Noncomposite numbers in the northwestern ray of the Ulam spiral as oriented on the March 1964 cover of Scientific American.
A168024
Noncomposite numbers in the northwestern ray of the Ulam spiral as oriented on the March 1964 cover of Scientific American.
Terms
- a(0) =1a(1) =5a(2) =17a(3) =37a(4) =101a(5) =197a(6) =257a(7) =401a(8) =577a(9) =677a(10) =1297a(11) =1601a(12) =2917a(13) =3137a(14) =4357a(15) =5477a(16) =7057a(17) =8101a(18) =8837a(19) =12101a(20) =13457a(21) =14401a(22) =15377a(23) =15877a(24) =16901a(25) =17957a(26) =21317a(27) =22501a(28) =24337a(29) =25601
External references
- oeis: A168024