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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

Table of n, a(n) for n=1..86.

Wikipedia, Arithmetic number

Index entries for characteristic functions

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 April 24 04:19 EDT 2018. Contains 302984 sequences. (Running on oeis4.)