This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A364148 #8 Aug 08 2023 19:09:18 %S A364148 23,79,109,491,599,797,809,853,953,1021,1171,1289,1361,1531,1543,1559, %T A364148 1811,1951,1987,2143,2179,2239,2273,2309,2381,2399,3169,3271,3343, %U A364148 3371,3433,3613,3701,4051,4157,4297,4327,4357,4457,4603,4789,4871,5227,5233,5443,5479,5623,5711,5737,5927,6073 %N A364148 Prime numbers that are the exact average of six consecutive odd semiprimes. %e A364148 23 is a term because (9 + 15 + 21 + 25 + 33 + 35)/6 = 23 is prime. %e A364148 109 is a term because (93 + 95 + 111 + 115 + 119 + 121)/6 = 109 is prime. %t A364148 Select[Mean /@ Partition[Select[Range[1, 6000, 2], PrimeOmega[#] == 2 &], 6, 1], PrimeQ] (* _Amiram Eldar_, Jul 11 2023 *) %Y A364148 Cf. A000040, A046315. %Y A364148 Cf. A363074, A363187, A363188, A364147, A364149. %K A364148 nonn %O A364148 1,1 %A A364148 _Elmo R. Oliveira_, Jul 10 2023