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 A111875 Concatenate the consecutive increasing numbers starting with prime(n) and ending with prime(n+1). 6
 23, 345, 567, 7891011, 111213, 1314151617, 171819, 1920212223, 23242526272829, 293031, 31323334353637, 3738394041, 414243, 4344454647, 47484950515253, 53545556575859, 596061, 61626364656667, 6768697071, 717273, 73747576777879 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Harvey P. Dale, Table of n, a(n) for n = 1..1000 EXAMPLE a(4)=7891011 because the 4th prime is 7 and the 5th is 11 and we concatenate those with the increasing numbers between. MATHEMATICA ccd[{a_, b_}]:=FromDigits[Flatten[IntegerDigits/@Range[a, b]]]; ccd/@ Partition[ Prime[ Range[30]], 2, 1] (* Harvey P. Dale, Jun 08 2015 *) CROSSREFS Sequence in context: A028039 A002118 A025993 * A028035 A077309 A042016 Adjacent sequences:  A111872 A111873 A111874 * A111876 A111877 A111878 KEYWORD easy,nonn,base AUTHOR Jason Earls, Aug 18 2005 STATUS approved

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Last modified September 18 15:44 EDT 2021. Contains 347527 sequences. (Running on oeis4.)