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 A089339 Number of primes beginning with n and of the form n concatenated with p where p takes all the prime values less than n. 1
 0, 0, 0, 1, 1, 0, 1, 1, 1, 2, 1, 1, 1, 0, 2, 3, 1, 1, 3, 2, 2, 3, 2, 3, 1, 2, 4, 2, 2, 4, 3, 2, 6, 2, 4, 5, 2, 2, 7, 2, 2, 6, 2, 3, 5, 4, 2, 4, 4, 3, 3, 3, 2, 8, 3, 5, 6, 3, 3, 7, 5, 4, 9, 2, 4, 5, 5, 4, 6, 3, 2, 9, 2, 4, 10, 2, 6, 8, 3, 4, 8, 7, 4, 8, 6, 5, 11, 7, 4, 8, 3, 2, 8, 9, 3, 10, 4, 7, 7, 4, 4, 11, 5 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,10 COMMENTS Conjecture: There are finitely many zeros in this sequence. What is the largest value of n such that a(n) = 0? Perhaps n = 14. LINKS EXAMPLE a(10) = 2 and 103 and 107 are the associated primes. CROSSREFS Cf. A089340. Sequence in context: A200650 A281743 A118404 * A249303 A319081 A182662 Adjacent sequences:  A089336 A089337 A089338 * A089340 A089341 A089342 KEYWORD base,nonn AUTHOR Amarnath Murthy, Nov 04 2003 EXTENSIONS Corrected and extended by Ray Chandler, Nov 07 2003 STATUS approved

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Last modified December 9 00:32 EST 2019. Contains 329871 sequences. (Running on oeis4.)