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A155049 Primes with even largest digit of prime(prime(n)). +0
1
13, 23, 53, 61, 79, 83, 89, 103, 107, 151, 179, 181, 197, 227, 257, 277, 281, 283, 311, 313, 331, 347, 353, 389, 409, 569, 601, 607, 631, 643, 674, 653, 701, 739, 743, 761, 797, 821, 823, 827, 829, 857, 859, 877, 881, 929, 947 (list; graph; listen)
OFFSET

1,1

EXAMPLE

If prime(n=6)=13 and prime(prime(6))=41, then 1<4=even and 13=a(1). If prime(n=8)=23 and prime(prime(8))=83, then even=8>3 and 23=a(2). If prime(n=16)=53 and prime(prime(16))=241, then 2<4=even>1 and 53=a(3). etc.

CROSSREFS

Cf. A000040.

Sequence in context: A068712 A103166 A154863 this_sequence A139863 A046862 A155093

Adjacent sequences: A155046 A155047 A155048 this_sequence A155050 A155051 A155052

KEYWORD

nonn,base

AUTHOR

Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), Jan 19 2009

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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