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 A068002 a(1) = 3, a(n+1) is the concatenation of a(n) and the next prime after a(n). 2
 3, 35, 3537, 35373539, 3537353935373551, 35373539353735513537353935373569, 3537353935373551353735393537356935373539353735513537353935373613 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS MATHEMATICA NextPrim[n_] := Block[{k = n + 1}, While[ !PrimeQ[k], k++ ]; k]; f[n_] := ToExpression[ ToString[n] <> ToString[ NextPrim[n]]]; NestList[f, 3, 7] NestList[FromDigits[Join[IntegerDigits[#], IntegerDigits[NextPrime[ #]]]]&, 3, 6] (* Harvey P. Dale, Apr 05 2015 *) CROSSREFS Cf. A067823, A068003, A068004. Sequence in context: A184458 A132940 A132941 * A132557 A069954 A134098 Adjacent sequences:  A067999 A068000 A068001 * A068003 A068004 A068005 KEYWORD easy,nonn,base AUTHOR Robert G. Wilson v, Feb 10 2002 STATUS approved

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Last modified August 4 15:50 EDT 2020. Contains 336202 sequences. (Running on oeis4.)