A140370 Composites of the form 26k + 21.

21, 99, 125, 177, 203, 255, 333, 385, 411, 437, 489, 515, 567, 645, 671, 697, 723, 749, 775, 801, 879, 905, 931, 957, 1035, 1113, 1139, 1165, 1191, 1243, 1269, 1295, 1347, 1425, 1477, 1503, 1529, 1555, 1581, 1633, 1659, 1685, 1711, 1737, 1763, 1815, 1841

Offset

1,1

Links

Table of n, a(n) for n=1..47.

Prog

(Magma) [(26*n+21): n in [0..100]|not IsPrime(26*n+21)] // Vincenzo Librandi, Dec 18 2010

Crossrefs

Cf. A092178.

Sequence in context: A212406 A288750 A178794 * A124949 A267681 A126408

Adjacent sequences: A140367 A140368 A140369 * A140371 A140372 A140373

Keyword

nonn,less

Author

Juri-Stepan Gerasimov, Jun 14 2008

Extensions

Edited by R. J. Mathar, Jun 16 2008

Status

approved