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Search: id:A078796
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A078796 a(n)=2*ceil(n*tau)-ceil(n*sqrt(5)) where tau=(1+sqrt(5))/2 is the Golden ratio. +0
1
1, 3, 3, 5, 6, 6, 8, 8, 9, 11, 11, 13, 14, 14, 16, 16, 17, 19, 19, 21, 21, 22, 24, 24, 26, 27, 27, 29, 29, 30, 32, 32, 34, 35, 35, 37, 37, 39, 40, 40, 42, 42, 43, 45, 45, 47, 48, 48, 50, 50, 51, 53, 53, 55, 55, 56, 58, 58, 60, 61, 61, 63, 63, 64, 66, 66, 68, 69, 69, 71, 71, 73 (list; graph; listen)
OFFSET

1,2

FORMULA

a(A005652(n))=A005652(n); a(A001950(n))=A001950(n)+1

PROGRAM

(PARI) a(n)=2*ceil(n*(1+sqrt(5))/2)-ceil(n*sqrt(5))

CROSSREFS

Cf. A078588.

Adjacent sequences: A078793 A078794 A078795 this_sequence A078797 A078798 A078799

Sequence in context: A131948 A134636 A088564 this_sequence A079789 A131209 A116592

KEYWORD

nonn

AUTHOR

Benoit Cloitre (benoit7848c(AT)orange.fr), Dec 05 2002

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Last modified October 12 15:26 EDT 2008. Contains 144830 sequences.


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