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 A071217 Numbers k such that the largest prime factor of the sum of successive primes p(k) + p(k+1) is greater than k. 1
 1, 9, 11, 12, 19, 23, 24, 29, 31, 32, 51, 54, 58, 63, 67, 71, 75, 76, 77, 84, 86, 87, 93, 95, 97, 103, 108, 110, 124, 128, 136, 151, 158, 159, 164, 169, 188, 191, 192, 200, 202, 205, 208, 210, 211, 216, 227, 232, 241, 243, 245, 246, 247, 252, 265, 273, 278, 282 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS FORMULA A071216(k) > k. EXAMPLE p(9) + p(10) = 23 + 29 = 52 = 2*2*13 and 13 > 10, so index 9 is here; it is the 2nd term. MATHEMATICA pf[x_] := Part[Reverse[Flatten[FactorInteger[x]]], 2] Do[s=pf[Prime[n+1]+Prime[n]]; If[Greater[s, n], Print[n]], {n, 1, 1000}] CROSSREFS Cf. A001043, A006530, A071216. Sequence in context: A031078 A216292 A250295 * A064930 A158607 A070699 Adjacent sequences:  A071214 A071215 A071216 * A071218 A071219 A071220 KEYWORD nonn AUTHOR Labos Elemer, May 17 2002 STATUS approved

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Last modified January 28 18:56 EST 2022. Contains 350657 sequences. (Running on oeis4.)