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A166496 Prime plus the next composite. 1
6, 7, 11, 15, 23, 27, 35, 39, 47, 59, 63, 75, 83, 87, 95, 107, 119, 123, 135, 143, 147, 159, 167, 179, 195, 203, 207, 215, 219, 227, 255, 263, 275, 279, 299, 303, 315, 327, 335, 347, 359, 363, 383, 387, 395, 399, 423, 447, 455, 459, 467, 479, 483, 503, 515, 527 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Differs from A072055 in the first term.

LINKS

Table of n, a(n) for n=1..56.

FORMULA

a(n)=prime(n)+smallest composite > prime(n).

EXAMPLE

a(1)=2+4=6,

a(2)=3+4=7,

a(3)=5+6=11.

MATHEMATICA

Prepend[2*Prime[Range[2, 100]]+1, 6]

CROSSREFS

Cf. A072055.

Sequence in context: A315832 A224856 A182156 * A267413 A297254 A347512

Adjacent sequences:  A166493 A166494 A166495 * A166497 A166498 A166499

KEYWORD

nonn

AUTHOR

Zak Seidov, Oct 15 2009

STATUS

approved

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Last modified October 17 16:06 EDT 2021. Contains 348065 sequences. (Running on oeis4.)