1,2

Differs from A071673 first time at the position n=37, where A072768(37) = 4, while A071673(37) = 5. RASTxx(A072768) differs from A071673 first time at the position n=704, which leads to conjecture that the repeated applications of RASTxx starting from A072643 converge towards A071673, the fixed point of RASTxx transformation.

Each value v occurs A000108(v) times. (The term a(0)=0 is not explicitly listed here as to get a better looking triangle).

A. Karttunen, Gatomorphisms (Includes the complete Scheme source for computing this sequence)

N. J. A. Sloane, Transforms (Maple code for RASTxx transform)

(Scheme) (define (A072768 n) (cond ((zero? n) n) (else (+ 1 (A072643 (A025581 (-1+ n))) (A072643 (A002262 (-1+ n)))))))

Same triangle computed modulo 2: A072770. Permutations: A072643, A071673, A072644, A072645, A072660, A072789. Cf. also A072769, A025581, A002262.

Sequence in context: A035453 A097747 A115777 this_sequence A071673 A072660 A075172

Adjacent sequences: A072765 A072766 A072767 this_sequence A072769 A072770 A072771

nonn,tabl

Antti Karttunen Jun 12 2002