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A079623 a(1)=a(2)=1, a(3)=4, a(n)=abs(a(n-1)-a(n-2)-a(n-3)). 6
1, 1, 4, 2, 3, 3, 2, 4, 1, 5, 0, 6, 1, 5, 2, 4, 3, 3, 4, 2, 5, 1, 6, 0, 7, 1, 6, 2, 5, 3, 4, 4, 3, 5, 2, 6, 1, 7, 0, 8, 1, 7, 2, 6, 3, 5, 4, 4, 5, 3, 6, 2, 7, 1, 8, 0, 9, 1, 8, 2, 7, 3, 6, 4, 5, 5, 4, 6, 3, 7, 2, 8, 1, 9, 0, 10, 1, 9, 2, 8, 3, 7, 4, 6, 5, 5, 6, 4, 7, 3, 8, 2, 9, 1, 10, 0, 11, 1, 10, 2, 9, 3, 8 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

FORMULA

a(n*(n-10))=0; Max( a(k) : 1<=k<=n) = floor(sqrt(n+24))

PROG

(Haskell)

a079623 n = a079623_list !! (n-1)

a079623_list = 1 : 1 : 4 : zipWith3 (\u v w -> abs (w - v - u))

               a079623_list (tail a079623_list) (drop 2 a079623_list)

-- Reinhard Zumkeller, Oct 11 2014

CROSSREFS

Cf. A078108, A080096.

Cf. A077623, A077653, A079624, A088226.

Sequence in context: A190874 A307367 A136626 * A177864 A090112 A226087

Adjacent sequences:  A079620 A079621 A079622 * A079624 A079625 A079626

KEYWORD

nonn

AUTHOR

Benoit Cloitre, Jan 30 2003

STATUS

approved

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Last modified May 25 17:53 EDT 2020. Contains 334595 sequences. (Running on oeis4.)