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A249832 Characteristic function of numbers having a valid Luhn mod 10 check digit. 3
1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

0

COMMENTS

a(A093018(n)) = 1; a(A249830(n)) = 0;

a(n) = if A093017(n) mod 10 = 0 then 1 else 0.

LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 0..10000

Wikipedia, Luhn algorithm

Index entries for sequences related to decimal expansion of n

Index entries for characteristic functions

FORMULA

a(n) = A000007(A093017(n) mod 10).

PROG

(Haskell)

a249832 = (0 ^) . flip mod 10 . a093017

CROSSREFS

Cf. A093017, A000007, A093018, A249830.

Sequence in context: A000007 A240351 A358008 * A014041 A353675 A015868

Adjacent sequences: A249829 A249830 A249831 * A249833 A249834 A249835

KEYWORD

nonn,base

AUTHOR

Reinhard Zumkeller, Nov 08 2014

STATUS

approved

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Last modified December 5 05:50 EST 2022. Contains 358578 sequences. (Running on oeis4.)