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A163396 Primes in carryless arithmetic mod 10 in which all digits except the rightmost are even. 5
21, 23, 25, 27, 29, 41, 43, 45, 47, 49, 61, 63, 65, 67, 69, 81, 83, 85, 87, 89, 201, 209, 227, 229, 241, 243, 261, 263, 287, 289, 403, 407, 421, 427, 443, 449, 463, 469, 481, 487, 603, 607, 623, 629, 641, 647, 661, 667, 683, 689, 801, 809, 821 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

These are called e-type primes.

LINKS

Table of n, a(n) for n=1..53.

Index entries for sequences related to carryless arithmetic

CROSSREFS

A169887 = A163396 union A169984.

Sequence in context: A169887 A007929 A143712 * A169903 A095447 A095443

Adjacent sequences:  A163393 A163394 A163395 * A163397 A163398 A163399

KEYWORD

nonn,base

AUTHOR

David Applegate, Marc LeBrun and N. J. A. Sloane, Aug 24 2010

STATUS

approved

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Last modified November 20 04:05 EST 2017. Contains 294959 sequences.