A053180 Numbers ending in 7 which are not prime.

27, 57, 77, 87, 117, 147, 177, 187, 207, 217, 237, 247, 267, 287, 297, 327, 357, 377, 387, 407, 417, 427, 437, 447, 477, 497, 507, 517, 527, 537, 567, 597, 627, 637, 657, 667, 687, 697, 707, 717, 737, 747, 767, 777, 807, 817, 837, 847, 867, 897, 917, 927

Offset

1,1

Links

G. C. Greubel, Table of n, a(n) for n = 1..10000

Mathematica

Select[Range[7, 1000, 10], !PrimeQ[#]&] (* Harvey P. Dale, Nov 03 2013 *)

Crossrefs

Intersection of A002808 (composites) and A017353 (ending with 7). - Michel Marcus, Sep 04 2018

Sequence in context: A042456 A132768 A352266 * A080864 A260440 A039459

Adjacent sequences: A053177 A053178 A053179 * A053181 A053182 A053183

Keyword

easy,nonn,base

Author

Enoch Haga, Feb 29 2000

Status

approved