# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a128958 Showing 1-1 of 1 %I A128958 #8 Jun 06 2017 14:24:39 %S A128958 2,3,5,6,12,14,17,20,26,35,36,38,39,48,50,65,66,71,72,74,80,87,89,90, %T A128958 96,105,107,108,113,114,119,120,122,132,134,135,137,144,146,152,155, %U A128958 156,158,162,167,168,185,186,200,201,207,213,221,225,230,231,236,237,248 %N A128958 Numbers n such that n^2+(n+1)^3 is prime. %C A128958 All terms are {0,2} mod 3. - _Zak Seidov_, Dec 15 2013 %H A128958 Zak Seidov, Table of n, a(n) for n = 1..2000 %e A128958 2^2+3^3=31, 3^2+4^3=73, 5^2+6^3=241, 6^2+7^3=379, 12^2+13^3=2341 all primes. %t A128958 Select[Range[0,300],PrimeQ[ #^2+(#+1)^3]&] %o A128958 (PARI) is(n)=isprime(n^2+(n+1)^3) \\ _Charles R Greathouse IV_, Jun 06 2017 %Y A128958 Corresponding primes are in A155933. - _Zak Seidov_, Dec 15 2013 %K A128958 nonn,easy %O A128958 1,1 %A A128958 _Zak Seidov_, Apr 28 2007 # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE