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 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; text; 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. LINKS Table of n, a(n) for n=1..40. EXAMPLE 13 is a term because concatenation of 13 and 1 is prime. CROSSREFS Cf. A085412, A085413, A012833, A024770, A033664, A069867. Sequence in context: A180544 A032750 A270596 * A068686 A082807 A088288 Adjacent sequences: A085411 A085412 A085413 * A085415 A085416 A085417 KEYWORD nonn,base AUTHOR _Zak Seidov_, Jun 29 2003 STATUS approved

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Last modified February 22 11:38 EST 2024. Contains 370255 sequences. (Running on oeis4.)