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A047501

Numbers that are congruent to {1, 3, 4, 5, 7} mod 8.

1, 3, 4, 5, 7, 9, 11, 12, 13, 15, 17, 19, 20, 21, 23, 25, 27, 28, 29, 31, 33, 35, 36, 37, 39, 41, 43, 44, 45, 47, 49, 51, 52, 53, 55, 57, 59, 60, 61, 63, 65, 67, 68, 69, 71, 73, 75, 76, 77, 79, 81, 83, 84, 85, 87, 89

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OFFSET

1,2

COMMENTS

Determined by final three binary digits of n.

LINKS

Table of n, a(n) for n=1..56.

Jorma K. Merikoski, Pentti Haukkanen, and Timo Tossavainen, The congruence x^n = -a^n (mod m): Solvability and related OEIS sequences, Notes. Num. Theor. Disc. Math. (2024) Vol. 30, No. 3, 516-529. See p. 528.

Index entries for sequences related to final digits of numbers

Index entries for linear recurrences with constant coefficients, signature (1,0,0,0,1,-1).

FORMULA

G.f.: x*(x^2 - x + 1)*(1+x)^3 / ( (x^4 + x^3 + x^2 + x + 1)*(x-1)^2 ). - R. J. Mathar, Oct 08 2011

CROSSREFS

Sequence in context: A187691 A141259 A349165 * A256455 A035242 A190941

Adjacent sequences: A047498 A047499 A047500 * A047502 A047503 A047504

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane

STATUS

approved

URL: https://oeis.org/A047501

⇱ A047501 - OEIS