OFFSET
1,5
COMMENTS
A cycle is called primitive if its elements are not a common multiple of the elements of another cycle.
The 3x+k function T_k is defined by T_k(x) = x/2 if x is even, (3x+k)/2 if x is odd, where k is odd.
For primitive cycles, GCD(k,6)=1.
We associate the cycle {0} with k = A226606(2) = 1.
For n>1 the first term of row n is 2^n-3^(n-1), and the last term is A036563(n) = 2^n-3.
LINKS
Geoffrey H. Morley, Rows 1..26 of array, flattened
EXAMPLE
The irregular array starts:
-1, 1;
1;
-1, 5;
-11, 7, 13;
-49, 5, 23, 29; ...
CROSSREFS
KEYWORD
sign,tabf
AUTHOR
Geoffrey H. Morley, Jul 02 2013
STATUS
approved