This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A072766 Transpose of A072764. 'cons' with arguments swapped. 9
 1, 2, 3, 4, 6, 7, 5, 14, 16, 8, 9, 15, 42, 19, 17, 10, 37, 43, 51, 44, 18, 11, 38, 121, 52, 126, 47, 20, 12, 39, 122, 149, 127, 135, 53, 21, 13, 40, 123, 150, 385, 136, 154, 56, 22, 23, 41, 124, 151, 386, 413, 155, 163, 60, 45, 24, 107, 125, 152, 387, 414, 475, 164 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS A. Karttunen, Gatomorphisms (with the complete Scheme source) PROG (Scheme function showing the general idea:) (define (A072766 n) (cond ((zero? n) n) (else (let ((y (A025581 (-1+ n))) (x (A002262 (-1+ n)))) (CatalanRankGlobal (parenthesization->binexp (cons (binexp->parenthesization (A014486 x)) (binexp->parenthesization (A014486 y))))))))) CROSSREFS Inverse permutation: A072767. a(n) = A069770(A072764(n)). Also transpose of A072764, i.e. a(n) = A072764(A038722(n)). Projection functions are A072772 & A072771. The sizes of the corresponding Catalan structures: A072768. The first column: A057548, the first row: A072795. Cf. also A025581, A002262. Sequence in context: A297933 A130264 A072659 * A071652 A089884 A172312 Adjacent sequences:  A072763 A072764 A072765 * A072767 A072768 A072769 KEYWORD nonn,tabl AUTHOR Antti Karttunen, Jun 12 2002 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified October 14 08:54 EDT 2019. Contains 327995 sequences. (Running on oeis4.)