Noncomposite numbers in the southwestern ray of the Ulam spiral as oriented on the March 1964 cover of Scientific American.
A168026
Noncomposite numbers in the southwestern ray of the Ulam spiral as oriented on the March 1964 cover of Scientific American.
Terms
- a(0) =1a(1) =7a(2) =43a(3) =73a(4) =157a(5) =211a(6) =421a(7) =601a(8) =1483a(9) =2551a(10) =2971a(11) =3907a(12) =4423a(13) =6163a(14) =6481a(15) =8191a(16) =12211a(17) =19183a(18) =22651a(19) =26407a(20) =27061a(21) =28393a(22) =31153a(23) =35533a(24) =37057a(25) =37831a(26) =42643a(27) =47743a(28) =55933a(29) =60763
External references
- oeis: A168026