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A175330 a(n) = the decimal equivalent of (the binary representation of prime(n)) AND (the binary representation of prime(n+1)). 2

%I

%S 2,1,5,3,9,1,17,19,21,29,5,33,41,43,37,49,57,1,67,65,73,67,81,65,97,

%T 101,99,105,97,113,3,129,137,129,149,149,129,163,165,161,177,181,129,

%U 193,197,195,211,195,225,225,233,225,241,1,257,261,269,261,273,281

%N a(n) = the decimal equivalent of (the binary representation of prime(n)) AND (the binary representation of prime(n+1)).

%C Read each binary representation of the primes from right to left and then AND respective digits to form the binary equivalent of each term of this sequence.

%C Indices of 1's: 2, 6, 18, 54, 564, 3512, 6542, 564163, 2063689, 54400028, ... - _Alex Ratushnyak_, Apr 22 2012

%p read("transforms") ; A175330 := proc(n) ANDnos(ithprime(n),ithprime(n+1)) ; end proc: seq(A175330(n),n=1..60) ; # _R. J. Mathar_, Apr 15 2010

%K base,nonn

%O 1,1

%A _Leroy Quet_, Apr 07 2010

%E More terms from _R. J. Mathar_, Apr 15 2010

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Last modified June 26 20:24 EDT 2019. Contains 324380 sequences. (Running on oeis4.)