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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
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, 101, 99, 105, 97, 113, 3, 129, 137, 129, 149, 149, 129, 163, 165, 161, 177, 181, 129, 193, 197, 195, 211, 195, 225, 225, 233, 225, 241, 1, 257, 261, 269, 261, 273, 281 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

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.

Indices of 1's: 2, 6, 18, 54, 564, 3512, 6542, 564163, 2063689, 54400028, ... - Alex Ratushnyak, Apr 22 2012

LINKS

Table of n, a(n) for n=1..60.

MAPLE

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

CROSSREFS

Sequence in context: A286295 A026205 A082748 * A085261 A179218 A131119

Adjacent sequences:  A175327 A175328 A175329 * A175331 A175332 A175333

KEYWORD

base,nonn

AUTHOR

Leroy Quet, Apr 07 2010

EXTENSIONS

More terms from R. J. Mathar, Apr 15 2010

STATUS

approved

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Last modified May 19 06:48 EDT 2019. Contains 323386 sequences. (Running on oeis4.)