

A097208


a(n) is the least k such that A098598(k) = n.


0



40, 24, 19, 17, 16, 10, 23, 21, 92, 313, 155, 551, 2575, 757, 13537, 5525, 35133, 33953, 332975, 355573, 3157535, 1571573, 2732737, 3775555, 5737571, 37332775
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OFFSET

0,1


COMMENTS

a(27) = 75787577. No more terms < 10^8.  David Wasserman, Dec 27 2007


LINKS

Table of n, a(n) for n=0..25.


EXAMPLE

a(3)=17 because it is the least number that contains 3 primes in the sequence 1,7,8,15,23,38,61,99,160,259.


MATHEMATICA

f[n_] := Block[{id = IntegerDigits[n], t = Floor[ Log[10, n] + 1], b}, Do[ b[i] = id[[i]], {i, t}]; b[i_] := b[i] = Plus @@ Table[b[i  j], {j, t}]; k = t + 1; While[b[k] < n^2, k++ ]; Count[ PrimeQ[ Table[b[i], {i, k  1}]], True]]; t = Table[0, {50}]; Do[c = f[n]; If[ t[[c + 1]] == 0, t[[c + 1]] = n; Print[c, " = ", n]], {n, 10, 12000000}]; t (* Robert G. Wilson v, Oct 07 2004 *)


CROSSREFS

Cf. A098598.
Sequence in context: A033975 A033360 A029543 * A216137 A163956 A229661
Adjacent sequences: A097205 A097206 A097207 * A097209 A097210 A097211


KEYWORD

base,nonn,more


AUTHOR

Jason Earls, Sep 17 2004


EXTENSIONS

Corrected and extended by Robert G. Wilson v, Oct 07 2004
a(25), a(27) and better definition from David Wasserman, Dec 27 2007


STATUS

approved



