cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

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A072144 Numbers n such that the period length of the 'Reverse and Subtract' trajectory of n is greater than 2.

Original entry on oeis.org

10001145, 10001827, 10002179, 10002289, 10002894, 10003037, 10003268, 10003378, 10004412, 10004698, 10006304, 10007624, 10007734, 10007965, 10008108, 10008713, 10008823, 10009175, 10009857, 10010022, 10010484
Offset: 1

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Author

Klaus Brockhaus, Jun 24 2002

Keywords

Comments

'Reverse and Subtract' (cf. A072137) is defined by x -> |x - reverse(x)|. - Subsequence of A072140.

Examples

			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

Cf. A072137, A072140, A072142, A072143, A072145.
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Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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