# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a333424 Showing 1-1 of 1 %I A333424 #16 Mar 21 2020 07:13:03 %S A333424 3,7,11,31,47,211,223,229,281,293,2311,2347,2383,2843,2879,30091, %T A333424 30181,30211,30307,30367,30427,30493,30553,30643,30829,30859,34871, %U A333424 34961,35051,35117,35267,35363,35393,35423,510751,511711,513067,513307,515143,517459,518179 %N A333424 Primes that are palindromes in primorial base. %H A333424 Amiram Eldar, Table of n, a(n) for n = 1..300 %H A333424 Wikipedia, Primorial number system. %H A333424 Index entries for sequences related to primorial base. %e A333424 3 is a term since it is a prime number and its representation in primorial base is 11 (1 * 2# + 1) which is a palindrome. %t A333424 max = 8; bases = Prime @ Range[max, 1, -1]; nmax = Times @@ bases - 1; Select[Range[nmax], PrimeQ[#] && PalindromeQ @ IntegerDigits[#, MixedRadix[bases]] &] %Y A333424 Intersection of A000040 and A333423. %Y A333424 Cf. A049345, A235168. %Y A333424 Cf. A002385, A016041, A029971, A029972, A029973, A029974, A029975, A029976, A029977, A029978, A029979, A029980, A029981, A029982, A333421. %K A333424 nonn %O A333424 1,1 %A A333424 _Amiram Eldar_, Mar 20 2020 # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE