Numbers k such that 1 + k^2 + k^4 + k^6 + k^8 + k^10 + k^12 + k^14 + k^16 + k^18 + k^20 + k^21 is prime.
A126915
Numbers k such that 1 + k^2 + k^4 + k^6 + k^8 + k^10 + k^12 + k^14 + k^16 + k^18 + k^20 + k^21 is prime.
Terms
- a(0) =2a(1) =6a(2) =12a(3) =60a(4) =68a(5) =138a(6) =270a(7) =446a(8) =488a(9) =620a(10) =656a(11) =798a(12) =872a(13) =942a(14) =950a(15) =1136a(16) =1140a(17) =1256a(18) =1400a(19) =1418a(20) =1506a(21) =1638a(22) =1776a(23) =1922a(24) =1992a(25) =2070a(26) =2082a(27) =2096a(28) =2220a(29) =2346
External references
- oeis: A126915