cp's OEIS Frontend

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.

A062352 Palindromic primes with strictly decreasing digits up to the middle and then strictly increasing.

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%I A062352 #14 Aug 04 2022 15:04:30
%S A062352 2,3,5,7,11,101,313,727,757,919,929,31013,73037,73237,74047,76367,
%T A062352 91019,93139,93239,94049,94349,96269,96469,97379,97579,98389,98689,
%U A062352 7310137,7521257,7540457,7630367,7632367,7654567,9320239,9610169
%N A062352 Palindromic primes with strictly decreasing digits up to the middle and then strictly increasing.
%C A062352 The last term of this finite series is 97654321012345679.
%C A062352 There are 84 terms. - _Michael S. Branicky_, Aug 04 2022
%H A062352 Michael S. Branicky, <a href="/A062352/b062352.txt">Table of n, a(n) for n = 1..84</a> (full sequence)
%H A062352 Patrick De Geest, <a href="http://www.worldofnumbers.com/palpri.htm">World of Palindromic Primes</a>
%e A062352 31013 belongs to the sequence as it is a palindromic prime in which the digits are decreasing up to the middle digit 0 and then increasing.
%o A062352 (Python)
%o A062352 from sympy import isprime
%o A062352 from itertools import combinations
%o A062352 def bgen():
%o A062352     for digits in range(1, 20):
%o A062352         for left in combinations("9876543210", (digits+1)//2):
%o A062352             left = "".join(left)
%o A062352             yield int(left + (left[:digits//2])[::-1])
%o A062352 afull = sorted(filter(isprime, bgen()))
%o A062352 print(afull) # _Michael S. Branicky_, Aug 04 2022
%Y A062352 Cf. A062351.
%K A062352 nonn,base,fini,full
%O A062352 1,1
%A A062352 _Amarnath Murthy_, Jun 23 2001
%E A062352 Corrected and edited by _Patrick De Geest_, Jun 07 2003