OFFSET
0,3
COMMENTS
This Catalan bijection rotates by "half step" the interpretations (pp)-(rr) of Stanley, using the "rising slope" mapping illustrated in A085161.
LINKS
A. Karttunen, Gatomorphisms (With the complete Scheme source)
CROSSREFS
Inverse: A085173. a(n) = A085161(A085173(A085161(n))) = A085169(A057502(A085170(n))) = A074684(A057502(A074683(n))). Occurs in A073200. Cf. also A085160 (whole step rotate), A086428.
KEYWORD
nonn
AUTHOR
Antti Karttunen, Jun 23 2003
STATUS
approved