A074090 Number of steps to reach an integer starting with s = n/4 and iterating the map x -> s*ceiling(x).

3, 1, 2, 0, 3, 2, 13, 0, 1, 1, 1, 0, 4, 3, 2, 0, 2, 1, 9, 0, 2, 2, 2, 0, 1, 1, 1, 0, 7, 4, 3, 0, 7, 1, 3, 0, 4, 2, 3, 0, 1, 1, 1, 0, 2, 3, 4, 0, 5, 1, 10, 0, 5, 2, 13, 0, 1, 1, 1, 0, 14, 5, 8, 0, 5, 1, 2, 0, 10, 2, 11, 0, 1, 1, 1, 0, 6, 3, 2, 0, 2, 1, 17, 0, 2, 2, 2, 0, 1, 1, 1, 0, 3, 4, 6, 0, 16, 1, 5, 0, 3, 2, 4

Offset

5,1

Links

Table of n, a(n) for n=5..107.

Maple

f := proc(b1, b2) local c1, c2, t1, t2, t3, t4, i; c1 := numer(b1/b2); c2 := denom(b1/b2); i := 0; while c2 <> 1 do i := i+1; t1 := ceil(c1/c2); t2 := b1*t1; t3 := t2/b2; c1 := numer(t3); c2 := denom(t3); od: RETURN(i); end; [seq(f(n, 4), n=5..120)];

Crossrefs

Cf. A072340, A074078.

Sequence in context: A190561 A359793 A074735 * A054025 A265910 A222212

Adjacent sequences: A074087 A074088 A074089 * A074091 A074092 A074093

Keyword

nonn

Author

N. J. A. Sloane, Sep 16 2002

Status

approved