A074937 - OEIS

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A074937

Let c(1) = c(2) = 1, c(n+2) = 1/(c(n+1)+c(n)); then a(n) = (1+sign(c(n)-sqrt(1/2)))/2.

1, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 1, 0, 1, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 1, 0, 1, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 1, 0, 1, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 1, 0, 1, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 1, 0, 1, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 1, 0, 1, 1, 0, 0, 1, 0, 0, 1, 1, 0, 1, 1, 0, 1, 1, 0, 0, 1, 0, 0, 1, 1, 0, 1, 1, 0, 1, 1, 0

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OFFSET

LINKS

Table of n, a(n) for n=1..107.

FORMULA

a(n) = 1 whenever A057677(n-1)/A066932(n-1) < sqrt(2), otherwise 0. - Andrey Zabolotskiy, Jan 01 2024

CROSSREFS

Cf. A057677, A066932.

Sequence in context: A077606 A004601 A372552 * A267418 A263919 A371689

Adjacent sequences: A074934 A074935 A074936 * A074938 A074939 A074940

KEYWORD

easy,nonn

AUTHOR

Benoit Cloitre, Oct 04 2002

EXTENSIONS

a(1) and a(2) added by Andrey Zabolotskiy, Jan 01 2024

STATUS

approved