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A072144
Numbers n such that the period length of the 'Reverse and Subtract' trajectory of n is greater than 2.
1
10001145, 10001827, 10002179, 10002289, 10002894, 10003037, 10003268, 10003378, 10004412, 10004698, 10006304, 10007624, 10007734, 10007965, 10008108, 10008713, 10008823, 10009175, 10009857, 10010022, 10010484
OFFSET
1,1
COMMENTS
'Reverse and Subtract' (cf. A072137) is defined by x -> |x - reverse(x)|. - Subsequence of A072140.
EXAMPLE
10001145 -> 44108856 -> 21771288 -> 66446424 -> 23981958 and 23981958 as a term of A072142 is the first term of the periodic part of the trajectory of 10001145, period length is 14.
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Klaus Brockhaus, Jun 24 2002
STATUS
approved