Numbers n such that n and the four successive integers produce primes if substituted for x in the polynomial 5x^2+5x+1. See A090562, A090563. Terms show that longer similar chains also exist.
A090100
Numbers n such that n and the four successive integers produce primes if substituted for x in the polynomial 5x^2+5x+1. See A090562, A090563. Terms show that longer similar chains also exist.
Terms
- a(0) =1a(1) =2a(2) =3a(3) =13a(4) =266a(5) =321a(6) =322a(7) =323a(8) =344a(9) =641a(10) =1324a(11) =5436a(12) =16700a(13) =16701a(14) =19857a(15) =19858a(16) =28151a(17) =28152a(18) =30648a(19) =31253a(20) =32045a(21) =45773a(22) =48710a(23) =50923a(24) =52397a(25) =57357a(26) =57358a(27) =63879a(28) =63880a(29) =63881
External references
- oeis: A090100