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A247678 Odd composite numbers congruent to 4 modulo 9. 8
49, 85, 121, 175, 247, 265, 301, 319, 355, 391, 427, 445, 481, 517, 535, 553, 589, 625, 679, 697, 715, 805, 841, 895, 913, 931, 949, 985, 1003, 1057, 1075, 1111, 1147, 1165, 1183, 1219, 1255, 1273, 1309, 1345, 1363, 1417, 1435, 1507, 1525, 1561, 1615, 1633 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Odimar Fabeny, Table of n, a(n) for n = 1..10000

MATHEMATICA

Select[18Range[125] + 13, Not[PrimeQ[#]] &] (* Alonso del Arte, Sep 24 2014 *)

PROG

(PARI) lista(nn) = {forcomposite(n=1, nn, if ((n % 2) && ((n % 9) == 4), print1(n, ", ")); ); } \\ Michel Marcus, Sep 22 2014

CROSSREFS

Cf. A017209 (9n + 4, supersequence of this sequence), A247676, A247679, A247681, A247682, A247683.

Sequence in context: A106311 A006832 A250074 * A093894 A259766 A273937

Adjacent sequences:  A247675 A247676 A247677 * A247679 A247680 A247681

KEYWORD

nonn,easy

AUTHOR

Odimar Fabeny, Sep 22 2014

STATUS

approved

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Last modified November 21 14:18 EST 2019. Contains 329371 sequences. (Running on oeis4.)