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A132083 a(n) = n-th positive integer which is coprime to (2^n +1). Also, a(n) = final term of row n in triangle A132082. 1
1, 2, 4, 4, 7, 7, 10, 8, 13, 12, 16, 12, 19, 17, 25, 16, 25, 23, 28, 21, 31, 27, 34, 24, 40, 32, 43, 29, 43, 42, 46, 32, 49, 42, 59, 38, 55, 47, 58, 40, 61, 59, 64, 46, 79, 57, 70, 48, 74, 63, 76, 55, 79, 73, 91, 56, 85, 72, 88, 63, 91, 77, 103, 64, 106, 88, 100, 72, 103, 93, 106 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..71.

MATHEMATICA

a = {1}; Do[i = 1; c = 0; While[c < n, If[GCD[i, 2^n + 1] == 1, c++ ]; i++ ]; AppendTo[a, i - 1], {n, 2, 80}]; a (* Stefan Steinerberger, Dec 26 2007 *)

CROSSREFS

Cf. A132082, A131880.

Sequence in context: A023831 A233272 A023844 * A286014 A102465 A139825

Adjacent sequences:  A132080 A132081 A132082 * A132084 A132085 A132086

KEYWORD

nonn

AUTHOR

Leroy Quet, Aug 09 2007

EXTENSIONS

More terms from Stefan Steinerberger, Dec 26 2007

STATUS

approved

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Last modified October 16 23:50 EDT 2019. Contains 328103 sequences. (Running on oeis4.)