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 A067823 Start with 2 and concatenate ("absorb") the next prime; continually repeat this procedure. 3

%I #4 Feb 11 2014 19:05:26

%S 2,23,2329,23292333,2329233323292337,23292333232923372329233323292391,

%T 2329233323292337232923332329239123292333232923372329233323292583

%N Start with 2 and concatenate ("absorb") the next prime; continually repeat this procedure.

%e The next prime after 2 is 3, so 23 follows 2 in the sequence. The next prime after 23 is 29, so 2329 comes after 23 in the sequence.

%t NextPrim[n_] := Block[{k = n + 1}, While[ !PrimeQ[k], k++ ]; k]; f[n_] := ToExpression[ ToString[n] <> ToString[ NextPrim[n]]]; NestList[f, 2, 7]

%K easy,nonn,base

%O 1,1

%A _Joseph L. Pe_, Feb 07 2002

%E Edited and extended by _Robert G. Wilson v_, Feb 10 2002

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Last modified August 14 10:15 EDT 2024. Contains 375159 sequences. (Running on oeis4.)