|
| |
|
|
A085414
|
|
Primes that are a concatenation of a prime and its first digit.
|
|
2
| |
|
|
131, 191, 313, 373, 797, 1031, 1091, 1511, 1571, 1811, 1931, 3313, 3373, 3533, 3593, 3673, 3733, 3793, 3833, 7517, 7577, 7877, 9199, 9419, 9479, 9539, 9679, 9719, 9839, 10091, 10211, 10331, 10391, 10631, 10691, 11171, 12011, 12491, 12791, 12911
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,1
|
|
|
COMMENTS
| Also primes remaining prime after deleting last digit, but not all such primes. See also A012833, A024770, A033664, A069867.
|
|
|
EXAMPLE
| 13 is a term because concatenation of 13 and 1 is prime
|
|
|
CROSSREFS
| Cf. A085412, A085413, A012833, A024770, A033664, A069867.
Sequence in context: A050261 A180544 A032750 * A068686 A082807 A088288
Adjacent sequences: A085411 A085412 A085413 * A085415 A085416 A085417
|
|
|
KEYWORD
| nonn,base
|
|
|
AUTHOR
| Zak Seidov (zakseidov(AT)yahoo.com), Jun 29 2003
|
| |
|
|
