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 A196936 a(n) is the first occurrence of n in sequence A196935. 0
 5, 7, 10, 15, 17, 20, 26, 32, 33, 35, 49, 62, 54, 63, 64, 74, 69, 71, 91, 98, 92, 102, 109, 116, 120, 124, 152, 137, 147, 144, 140, 171, 165, 192, 197, 195, 199, 201, 200, 218, 220, 250, 238, 229, 239, 230, 236, 277, 267, 281, 300, 299, 301, 314, 312, 332, 325 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS The Mathematica program gives the first 57 terms. LINKS Table of n, a(n) for n=1..57. Definition of Arithmetic Progressions of Primes EXAMPLE A196935(5) = 1, so a(1) = 5; (consider the offset of 5 for A196935) A196935(7) = 2, and all A196935(k) <> 2 for k < 7, so a(2) = 7 MATHEMATICA max = 57; Array[fa, max]; Do[fa[i] = 0, {i, 1, max}]; i = 4; done = 0; While[done < max, i++; p = Prime[i]; j = 0; ct = 0; While[j++; df = 6*j; df < p, If[(PrimeQ[p + df]) && (PrimeQ[p - df]), ct++]]; If[ct <= max, If[fa[ct] == 0, fa[ct] = i; done++]]]; Table[fa[i], {i, 1, max}] CROSSREFS Cf. A196935, A196934. Sequence in context: A020711 A183044 A133756 * A188196 A048584 A085382 Adjacent sequences: A196933 A196934 A196935 * A196937 A196938 A196939 KEYWORD nonn AUTHOR Lei Zhou, Oct 07 2011 STATUS approved

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Last modified May 25 09:23 EDT 2024. Contains 372786 sequences. (Running on oeis4.)