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 A245656 Characteristic function of arithmetic numbers, cf. A003601. 7
 1, 0, 1, 0, 1, 1, 1, 0, 0, 0, 1, 0, 1, 1, 1, 0, 1, 0, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0, 1, 1, 1, 0, 1, 0, 1, 0, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 0, 0, 1, 1, 1, 0, 0, 0, 1, 0, 1, 1 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1 COMMENTS a(A003601(n)) = 1; a(A049642(n)) = 0. LINKS Wikipedia, Arithmetic number FORMULA a(n) = A000007(A054025(n)). PROG (Haskell) a245656 = (0 ^) . a054025 :: (Integral a, Integral t) => a -> t CROSSREFS Cf. A003601, A049642, A054025, A000007, A069928 (partial sums). Sequence in context: A288932 A213061 A245837 * A285625 A283966 A267442 Adjacent sequences:  A245653 A245654 A245655 * A245657 A245658 A245659 KEYWORD nonn AUTHOR Reinhard Zumkeller, Jul 28 2014 STATUS approved

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Last modified December 12 07:49 EST 2018. Contains 318053 sequences. (Running on oeis4.)