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A226606 Irregular array read by rows in which a(n) is the denominator of the rational number, in a 3x+1 cycle, with numerator A226605(n). 3
1, 1, 1, 1, 5, 11, 7, 13, 49, 5, 5, 23, 23, 29, 179, 17, 17, 37, 37, 37, 11, 55, 61, 601, 115, 115, 47, 115, 47, 47, 101, 47, 47, 101, 101, 101, 119, 101, 17, 119, 125, 1931, 473, 473, 13, 473, 13, 13, 35, 13, 13, 175, 13, 175, 175, 229, 13, 35, 175, 25, 229 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,5

LINKS

Geoffrey H. Morley, Rows 1..16 of array, flattened

See A226605 for other link(s).

FORMULA

If v(0) to v(m-1) are the bits of A102659(n), when 2s are replaced by 0s, then a(n) = D(n)/GCD(N(n),D(n)) where D(n) = 2^m - 3^(v(0)+...+v(m-1)) and N(n) = sum_{j=0 to m-1} (2^j)(3^(v(j+1)+...+v(m-1)))v(j).

CROSSREFS

Sequence in context: A079778 A172183 A088213 * A226619 A068419 A226586

Adjacent sequences:  A226603 A226604 A226605 * A226607 A226608 A226609

KEYWORD

nonn,frac,tabf

AUTHOR

Geoffrey H. Morley, Jun 27 2013

STATUS

approved

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Last modified March 21 10:13 EDT 2019. Contains 321368 sequences. (Running on oeis4.)