A082861 - OEIS

A082861

Lower triangular region of A082860.

0, 1, 1, 2, 2, 2, 3, 3, 6, 3, 4, 4, 4, 14, 4, 5, 5, 5, 15, 11, 5, 6, 6, 6, 6, 14, 15, 6, 7, 7, 16, 7, 42, 43, 16, 7, 8, 8, 19, 8, 51, 52, 19, 20, 8, 9, 9, 9, 37, 9, 28, 37, 121, 149, 9, 10, 10, 10, 38, 10, 29, 38, 122, 150, 25, 10, 11, 11, 11, 39, 11, 11, 39, 123, 151, 28, 29, 11, 12, 12, 12, 40, 30, 12, 40, 124, 152, 84, 85, 30, 12, 13, 13, 13, 41, 33, 13, 41, 125, 153

(list; table; graph; refs; listen; history; text; internal format)

OFFSET

0,4

LINKS

Table of n, a(n) for n=0..99.

Antti Karttunen, Alternative Catalan Orderings (with the complete Scheme source)

PROG

(Scheme-functions showing the essential idea. For the full source, follow the "Alternative Catalan Orderings" link.)

(define (A082861 n) (A080300 (parenthesization->binexp (LCSB (binexp->parenthesization (A014486 (A003056 n))) (binexp->parenthesization (A014486 (A002262 n)))))))

CROSSREFS

Cf. A082859, A003056, A002262.

Sequence in context: A103600 A267160 A374436 * A131704 A327746 A348626

Adjacent sequences: A082858 A082859 A082860 * A082862 A082863 A082864

KEYWORD

nonn,tabl

AUTHOR

Antti Karttunen, May 06 2003

STATUS

approved