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A171469 Nonnegative nonprimes which are neither the sum nor the product of two distinct primes. 1
0, 1, 4, 27, 117, 121, 125, 135, 147, 171, 189, 207, 245, 255, 261, 275, 289, 297, 325, 343, 345, 357, 363, 387, 405, 425, 429, 455, 475, 477, 483, 495, 507, 513, 529, 531, 539, 555, 561, 567, 575, 585, 605, 625, 627, 637, 639, 651, 657, 665, 705, 715, 725, 747, 765, 777 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

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

MATHEMATICA

prs=Prime[Range[150]];

prodprs=Times@@@Subsets[prs, {2}];

sumprs=Plus@@@Subsets[prs, {2}];

Complement[Range[0, 800], prs, prodprs, sumprs]  (* Harvey P. Dale, Jan 23 2011 *)

CROSSREFS

Cf. A000040, A166081, A109934, A141468, A006881.

Sequence in context: A063262 A156223 A048102 * A267685 A190584 A268598

Adjacent sequences:  A171466 A171467 A171468 * A171470 A171471 A171472

KEYWORD

nonn

AUTHOR

Juri-Stepan Gerasimov, Dec 09 2009

EXTENSIONS

Definition clarified, sequence corrected (51 removed, 289 inserted) and extended by R. J. Mathar, Apr 24 2010

STATUS

approved

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Last modified November 20 12:13 EST 2019. Contains 329335 sequences. (Running on oeis4.)