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 A107309 Concatenation of twin primes in reverse order. 0
 53, 75, 1311, 1917, 3129, 4341, 6159, 7371, 103101, 109107, 139137, 151149, 181179, 193191, 199197, 229227, 241239, 271269, 283281, 313311, 349347, 421419, 433431, 463461, 523521, 571569, 601599, 619617, 643641, 661659, 811809, 823821, 829827, 859857, 883881, 10211019, 10331031, 10511049, 10631061, 10931091, 11531151 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 LINKS Chris Caldwell, The First 1,008 Twin Primes. EXAMPLE The twin primes 41 and 43 are concatenated in reverse order to give 4341, which is the sixth term in the sequence. MATHEMATICA f[{a_, b_}]:=FromDigits[Join[IntegerDigits[b], IntegerDigits[a]]]; f/@Select[Partition[Prime[Range[200]], 2, 1], #[[2]]-#[[1]]==2&] (* Harvey P. Dale, Jan 01 2011 *) CROSSREFS Cf. A095958. Sequence in context: A057667 A160041 A013538 * A039389 A043212 A043992 Adjacent sequences:  A107306 A107307 A107308 * A107310 A107311 A107312 KEYWORD nonn,base,less AUTHOR Parthasarathy Nambi, May 20 2005 EXTENSIONS More terms from Harvey P. Dale, Jan 01 2011 STATUS approved

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Last modified October 20 21:32 EDT 2020. Contains 337910 sequences. (Running on oeis4.)