A072773 The upper triangular region of A072764.

1, 3, 6, 7, 16, 42, 8, 19, 51, 52, 17, 44, 126, 127, 385, 18, 47, 135, 136, 413, 414, 20, 53, 154, 155, 475, 476, 477, 21, 56, 163, 164, 503, 504, 505, 506, 22, 60, 177, 178, 551, 552, 553, 554, 555, 45, 128, 390, 391, 1243, 1244, 1245, 1246, 1247, 4089, 46

Offset

0,2

Links

Table of n, a(n) for n=0..55.

A. Karttunen, Gatomorphisms (with the complete Scheme source)

Prog

(Scheme function showing the general idea:) (define (A072773 n) (CatalanRankGlobal (parenthesization->binexp (cons (binexp->parenthesization (A014486 (A003056 n))) (binexp->parenthesization (A014486 (A002262 n)))))))

Crossrefs

Cf. also A014486, A003056, A002262.

Sequence in context: A227723 A192124 A334210 * A130049 A333553 A341183

Adjacent sequences: A072770 A072771 A072772 * A072774 A072775 A072776

Keyword

nonn,tabl

Author

Antti Karttunen, Jun 12 2002

Status

approved