A166496 Prime plus the next composite.

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

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