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A053177 Composite numbers produced in A053176. 1
15, 27, 35, 39, 63, 75, 87, 95, 119, 123, 135, 143, 147, 159, 195, 203, 207, 215, 219, 255, 275, 279, 299, 303, 315, 327, 335, 363, 387, 395, 399, 423, 447, 455, 459, 483, 515, 527, 539, 543, 555, 567, 615, 623, 627, 635, 663, 675, 695, 699, 707, 735, 747 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

FORMULA

From the composite, subtract 1, divide by 2 and result is a prime.

EXAMPLE

a(3)=35 and 35-1=34, 34/2=17, prime.

CROSSREFS

Sequence in context: A080946 A110703 A091236 * A145195 A096022 A097222

Adjacent sequences:  A053174 A053175 A053176 * A053178 A053179 A053180

KEYWORD

easy,nonn

AUTHOR

Enoch Haga (Enokh(AT)comcast.net), Feb 29 2000

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Last modified February 14 20:13 EST 2012. Contains 205663 sequences.