A083940 - OEIS

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A083940

A014486-indices of symmetric binary trees.

0, 1, 6, 43, 51, 389, 416, 477, 504, 551, 4102, 4191, 4397, 4485, 4649, 5100, 5187, 5393, 5481, 5645, 5964, 6051, 6215, 6489, 47404, 47700, 48403, 48697, 49268, 50833, 51126, 51828, 52120, 52691, 53829, 54120, 54690, 55690, 59334, 59627, 60328

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OFFSET

0,3

COMMENTS

Fixed points of permutation A057163.

LINKS

Table of n, a(n) for n=0..40.

FORMULA

a(0)=0, a(n)=A072764bi(n-1, A057163(n-1)).

CROSSREFS

a(n) = A080300(A083941(n)). Cf. A083938, A084108.

Sequence in context: A291192 A185222 A179861 * A101071 A299375 A097298

Adjacent sequences: A083937 A083938 A083939 * A083941 A083942 A083943

KEYWORD

nonn

AUTHOR

Antti Karttunen, May 13 2003

STATUS

approved