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A155786 Primes such that 1 = abs(first digit of n-th prime - final digit of n-th prime). 0
23, 43, 67, 89, 211, 223, 233, 241, 251, 263, 271, 281, 283, 293, 433, 443, 463, 607, 617, 647, 677, 809, 827, 829, 839, 857, 859, 877, 887, 2003, 2011, 2053, 2063, 2081, 2083, 2111, 2113, 2131, 2141, 2143, 2153, 2161, 2203, 2213, 2221, 2243, 2251, 2273 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..48.

EXAMPLE

If 23=prime(9) and 1=abs(2-3)=abs(-1), then 23=a(1). If 43=prime(14) and 1=abs(4-3), then 43=a(2). If 67=prime(18) and 1=abs(6-7)=abs(-1), then=a(3), etc.

PROG

(PARI) is(n)=abs(digits(n)[1]-n%10)==1 && isprime(n) \\ Charles R Greathouse IV, Dec 29 2012

CROSSREFS

Cf. A000040.

Sequence in context: A156979 A281226 A158283 * A296563 A023264 A180534

Adjacent sequences:  A155783 A155784 A155785 * A155787 A155788 A155789

KEYWORD

nonn,base

AUTHOR

Juri-Stepan Gerasimov, Jan 27 2009

EXTENSIONS

Inserted 827, 857, 877 etc. R. J. Mathar, Feb 13 2009

STATUS

approved

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Last modified May 21 08:53 EDT 2019. Contains 323441 sequences. (Running on oeis4.)