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A168006 Primes n with property that first digit of 2*n = last digit of n. 1
37, 61, 71, 163, 173, 193, 367, 397, 479, 499, 521, 541, 571, 601, 631, 641, 661, 691, 701, 751, 761, 811, 821, 881, 911, 941, 971, 991, 1523, 1543, 1553, 1583, 1613, 1663, 1693, 1723, 1733, 1753, 1783, 1823, 1873, 1913, 1933, 1973, 1993, 3517, 3527, 3547 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Or, primes in A167994.

LINKS

G. C. Greubel, Table of n, a(n) for n = 1..1000

EXAMPLE

2*37=74, 2*61=122.

MATHEMATICA

Select[Prime[Range[800]], First[IntegerDigits[2#]]==Last[ IntegerDigits[#]]&] (* Harvey P. Dale, May 27 2011 *)

CROSSREFS

Cf. A167994.

Sequence in context: A105461 A288617 A032627 * A139960 A103946 A107142

Adjacent sequences:  A168003 A168004 A168005 * A168007 A168008 A168009

KEYWORD

base,nonn

AUTHOR

Zak Seidov, Nov 16 2009

STATUS

approved

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Last modified March 2 12:26 EST 2021. Contains 341750 sequences. (Running on oeis4.)