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A065003 Not McNugget numbers. 3
1, 2, 3, 4, 5, 7, 8, 10, 11, 13, 14, 16, 17, 19, 22, 23, 25, 28, 31, 34, 37, 43 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

A McNugget number has the form 6x + 9y + 20z for nonnegative integers x, y, z.

A214772(a(n)) = 0. - Reinhard Zumkeller, Jul 28 2012

REFERENCES

C. U. Jensen, A. Thorup, Gorenstein orders, Journal of Pure and Applied Algebra, 2014, to appear. See Example 7.1. - N. J. A. Sloane, Jul 22 2014

Eric Weisstein, Concise Encyclopedia of Mathematics, p. 1151.

LINKS

Table of n, a(n) for n=1..22.

James Grime and Brady Haran, How to order 43 Chicken McNuggets, 2012.

Eric Weisstein's World of Mathematics, McNugget Numbers.

Wikipedia, Coin problem

MATHEMATICA

Select[Range[43], Length@FrobeniusSolve[{6, 9, 20}, #] == 0 &] (* Arkadiusz Wesolowski, Feb 20 2013 *)

PROG

(Haskell)

import Data.List (elemIndices)

a065003 n = a065003_list !! n

a065003_list = elemIndices 0 $ map a214772 [0..43]

-- Reinhard Zumkeller, Jul 28 2012

(PARI) is(n)=forstep(k=n, 6, -20, if(k%3==0, return(0))); n%20>0 \\ Charles R Greathouse IV, May 05 2013

CROSSREFS

Cf. A214777 (complement).

Sequence in context: A037014 A225061 A133223 * A189729 A056177 A025199

Adjacent sequences:  A065000 A065001 A065002 * A065004 A065005 A065006

KEYWORD

easy,fini,full,nonn

AUTHOR

Karl Sabbagh (karl.sabbagh(AT)btinternet.com), Nov 01 2001

STATUS

approved

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Last modified November 22 23:43 EST 2014. Contains 249835 sequences.