

A145382


Write the nth prime in binary. Change all 0's to 1's and all 1's to 0's. a(n) is the decimal equivalent of the result.


3



1, 0, 2, 0, 4, 2, 14, 12, 8, 2, 0, 26, 22, 20, 16, 10, 4, 2, 60, 56, 54, 48, 44, 38, 30, 26, 24, 20, 18, 14, 0, 124, 118, 116, 106, 104, 98, 92, 88, 82, 76, 74, 64, 62, 58, 56, 44, 32, 28, 26, 22, 16, 14, 4, 254, 248, 242, 240, 234, 230, 228, 218, 204, 200, 198, 194, 180, 174
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OFFSET

1,3


COMMENTS

a(n) = A035327(p(n)), where p(n) is the nth prime.


LINKS

Table of n, a(n) for n=1..68.


FORMULA

a(n)=2^{1+floor(log[2](p(n)))}n1, where p(n) is the nth prime.  Emeric Deutsch, Oct 19 2008


MAPLE

f:=proc(n) options operator, arrow: 2^(1+floor(log[2](n)))n1 end proc: seq(f(ithprime(n)), n=1..71); # Emeric Deutsch, Oct 19 2008


CROSSREFS

A171008 gives the binary expansions. Cf. A035327.
Sequence in context: A234312 A244136 A133168 * A192423 A265584 A078909
Adjacent sequences: A145379 A145380 A145381 * A145383 A145384 A145385


KEYWORD

base,nonn


AUTHOR

Leroy Quet, Oct 09 2008


EXTENSIONS

Extended by Emeric Deutsch, Oct 19 2008


STATUS

approved



