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A140390 Nonprimes of the form 21k+1. +0
1
1, 22, 64, 85, 106, 148, 169, 190, 232, 253, 274, 295, 316, 358, 400, 442, 484, 505, 526, 568, 589, 610, 652, 694, 715, 736, 778, 799, 820, 841, 862, 904, 925, 946, 988, 1030, 1072, 1114, 1135, 1156, 1177, 1198, 1219, 1240, 1261, 1282, 1324 (list; graph; listen)
OFFSET

1,2

COMMENT

The prime numbers 421=20*21+1 and 673=32*21+1, for example, are neither in here nor in A136069.

CROSSREFS

Cf. A136069.

Sequence in context: A044505 A156797 A051874 this_sequence A069178 A081929 A124715

Adjacent sequences: A140387 A140388 A140389 this_sequence A140391 A140392 A140393

KEYWORD

nonn,less

AUTHOR

Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), Jun 12 2008

EXTENSIONS

Edited by R. J. Mathar, Jun 17 2008

page 1

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Last modified November 25 14:49 EST 2009. Contains 167514 sequences.


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