

A113763


Nonmultiples of 13, or numbers not divisible by 13.


5



1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77
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OFFSET

1,2


COMMENTS

Cf. A011760 (Elevator buttons in U.S.A).
Cf. A023806 (all digits in base 12 are different).
Complement of A008595.  Reinhard Zumkeller, Apr 26 2011


LINKS

Table of n, a(n) for n=1..72.
Eric Weisstein's World of Mathematics, Triskaidekaphobia
Index entries for linear recurrences with constant coefficients, signature (1,0,0,0,0,0,0,0,0,0,0,1,1).


FORMULA

a(n) = n+floor((2n1)/24) = n+quotient(2n1, 24)


MATHEMATICA

Table[n+Quotient[2n1, 24], {n, 1, 85}]; (* or *)Table[n+Floor[(2n1)/24], {n, 1, 85}]


PROG

(Sage) [i for i in range(80) if gcd(13, i) == 1]  Zerinvary Lajos, Apr 21 2009
(PARI) a(n)=(26*n1)\24 \\ Charles R Greathouse IV, Jun 08 2015


CROSSREFS

Cf. A011760, A023806.
Sequence in context: A252474 A172270 A023806 * A322847 A302492 A023754
Adjacent sequences: A113760 A113761 A113762 * A113764 A113765 A113766


KEYWORD

nonn,easy


AUTHOR

Zak Seidov, Jan 18 2006


STATUS

approved



