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A127207 Half-indexed Lucas numbers a(n)=round(sqrt((1+sqrt(5))/2)^n) a(2n)=L(n)=A000032, so a(n)=L(n/2). 0
1, 2, 2, 3, 3, 4, 5, 7, 9, 11, 14, 18, 23, 29, 37, 47, 60, 76, 97, 123, 156, 199, 253, 322, 410, 521, 663, 843, 1072, 1364, 1735, 2207, 2807, 3571, 4542, 5778, 7350, 9349, 11892, 15127, 19242, 24476, 31134, 39603, 50376, 64079 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

a(n)+a(n+2)=a(n+4), a(n+4)+1 or a(n+4)-1.

LINKS

Table of n, a(n) for n=1..46.

MAPLE

for n from 1 to 60 do a[n]:=round(sqrt((1+sqrt(5))/2)^n) od: seq(a[n], n=1..60);

CROSSREFS

Cf. A000032.

Sequence in context: A036816 A113788 A018243 * A173513 A147663 A301765

Adjacent sequences:  A127204 A127205 A127206 * A127208 A127209 A127210

KEYWORD

easy,nonn

AUTHOR

Miklos Kristof, Mar 28 2007

STATUS

approved

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Last modified September 18 22:46 EDT 2020. Contains 337174 sequences. (Running on oeis4.)