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A104332 Primes which are the reverse concatenation of two consecutive odd numbers. 1

%I

%S 31,53,97,2927,3331,3533,4139,5351,6361,6563,6967,7573,8179,9391,

%T 111109,113111,123121,129127,131129,143141,153151,155153,159157,

%U 161159,171169,185183,189187,191189,195193,219217,221219,225223,233231,239237,255253

%N Primes which are the reverse concatenation of two consecutive odd numbers.

%e The first term is 31 which is a prime and is the reverse concatenation of 1 and 3 which are two consecutive odd numbers.

%K base,nonn

%O 1,1

%A _Shyam Sunder Gupta_, Apr 17 2005

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Last modified October 16 15:51 EDT 2019. Contains 328101 sequences. (Running on oeis4.)