login
A158190
Nonprime numbers with final digit prime.
0
12, 15, 22, 25, 27, 32, 33, 35, 42, 45, 52, 55, 57, 62, 63, 65, 72, 75, 77, 82, 85, 87, 92, 93, 95, 102, 105, 112, 115, 117, 122, 123, 125, 132, 133, 135, 142, 143, 145, 147, 152, 153, 155, 162, 165, 172, 175, 177, 182, 183, 185, 187, 192, 195, 202, 203, 205, 207
OFFSET
1,1
COMMENTS
Prime digits are 2, 3, 5 or 7.
FORMULA
a(n) ~ 2.5n
CROSSREFS
Cf. A141468.
Sequence in context: A353702 A335859 A259040 * A122040 A342758 A274550
KEYWORD
nonn,base,less
AUTHOR
EXTENSIONS
Entries checked by R. J. Mathar, May 19 2010
STATUS
approved