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 A258091 Smallest prime factor of 1+78557*2^n, cf. A258073. 4
 5, 3, 73, 3, 5, 3, 7, 3, 5, 3, 13, 3, 5, 3, 19, 3, 5, 3, 7, 3, 5, 3, 13, 3, 5, 3, 37, 3, 5, 3, 7, 3, 5, 3, 13, 3, 5, 3, 71, 3, 5, 3, 7, 3, 5, 3, 13, 3, 5, 3, 19, 3, 5, 3, 7, 3, 5, 3, 13, 3, 5, 3, 37, 3, 5, 3, 7, 3, 5, 3, 13, 3, 5, 3, 73, 3, 5, 3, 7, 3, 5, 3 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS a(n) = A020639(A258073(a(n))); a(n) <= 73; see also A258095. LINKS Reinhard Zumkeller, Table of n, a(n) for n = 1..10000 Wikipedia, Sierpinski Number PROG (Haskell) a258091 = a020639 . a258073 CROSSREFS Cf. A020639, A258073, A258095. Sequence in context: A007299 A257935 A109254 * A255599 A145985 A180403 Adjacent sequences:  A258088 A258089 A258090 * A258092 A258093 A258094 KEYWORD nonn AUTHOR Reinhard Zumkeller, May 19 2015 STATUS approved

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Last modified May 22 21:17 EDT 2019. Contains 323504 sequences. (Running on oeis4.)