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 A155489 Primes p such that p and prime(p) have an odd largest digit. 0

%I #12 Feb 19 2021 02:57:21

%S 3,5,7,11,17,19,29,31,37,59,67,71,73,97,101,109,113,127,131,137,139,

%T 149,157,167,173,191,193,199,223,229,233,239,251,269,271,293,307,317,

%U 337,349,359,367,373,379,397,419,439,449,457,467,479,491,499,503,509,521

%N Primes p such that p and prime(p) have an odd largest digit.

%e 3 is a term because it is prime, its largest digit is odd, and the largest digit of prime(3)=5 is also odd.

%e 13 is not a term because the largest digit of prime(13)=41 is even.

%Y Cf. A000040.

%Y Subsequence of A155058.

%K nonn,base,less

%O 1,1

%A _Juri-Stepan Gerasimov_, Jan 23 2009

%E Corrected (43 removed, 167 inserted, 263 removed) by _R. J. Mathar_, May 10 2010

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Last modified May 18 23:43 EDT 2024. Contains 372666 sequences. (Running on oeis4.)