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A127307 Positions of Dyck words beginning as UUD (110) in A014486/A063171. 3

%I #2 Mar 31 2012 13:21:14

%S 3,6,7,14,15,16,17,18,37,38,39,40,41,42,43,44,45,46,47,48,49,50,107,

%T 108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,

%U 125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141

%N Positions of Dyck words beginning as UUD (110) in A014486/A063171.

%F a(n) = A072764bi(A072795(A072771(n)),A072772(n)).

%o (Scheme:) (define (A127307 n) (A072764bi (A072795 (A072771 n)) (A072772 n)))

%o (define (*A127307 s) (cons (cons '() (car s)) (cdr s))) ;; Corresponding function acting on S-expressions.

%K nonn

%O 1,1

%A _Antti Karttunen_, Jan 16 2007

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Last modified March 29 05:28 EDT 2024. Contains 371264 sequences. (Running on oeis4.)