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 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 (list; graph; refs; listen; history; text; internal format)
 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: A033360 A370402 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

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Last modified September 13 11:57 EDT 2024. Contains 375905 sequences. (Running on oeis4.)