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A248501 Numbers m that are coprime to floor(m/16). 6
1, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 33, 35, 37, 39, 41, 43, 45, 47, 49, 50, 52, 53, 55, 56, 58, 59, 61, 62, 65, 67, 69, 71, 73, 75, 77, 79, 81, 82, 83, 84, 86, 87, 88, 89, 91, 92, 93, 94, 97, 101, 103, 107, 109, 113, 114, 115 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Definition of 'being coprime' and special-case conventions are as in Wikipedia. In particular, when m<16 then floor(m/16)=0, and zero is coprime only to 1. The complementary sequence is A248502.

LINKS

Stanislav Sykora, Table of n, a(n) for n = 1..20000

Wikipedia, Coprime integers

FORMULA

gcd(a(n),floor(a(n)/16)) = 1.

EXAMPLE

1 is a member because gcd(1,0)=1.

2 is not, because gcd(2,0)=2.

129 is a member because 129 and floor(129/16)=8.

PROG

(PARI) a=vector(20000);

i=n=0; while(i++, if(gcd(i, i\16)==1, a[n++]=i; if(n==#a, break))); a

CROSSREFS

Cf. A248499, A248500, A248502.

Sequence in context: A262460 A190582 A004457 * A115420 A250038 A270043

Adjacent sequences:  A248498 A248499 A248500 * A248502 A248503 A248504

KEYWORD

nonn,base,easy

AUTHOR

Stanislav Sykora, Oct 07 2014

STATUS

approved

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Last modified May 26 03:22 EDT 2017. Contains 287073 sequences.