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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A165121 Consider the base-9 Kaprekar map n->K(n) defined in A165110. Sequence gives least elements of each cycle of length > 1.

Original entry on oeis.org

16, 320, 2256, 3712, 34960, 183696, 3496800, 31596672, 278474880, 2066242576, 2516902752, 26531651360, 167365651216, 203869268832, 211282856832, 2145190286000, 2184410558000, 16513410921312, 176898519791120
Offset: 1

Views

Author

Joseph Myers, Sep 04 2009

Keywords

Comments

Initial terms in base 9: 17, 385, 3076, 5074, 52854, 308876, 6518633, 65407433, 641888643, 5288888854.

Links

Crossrefs

Cf. A165110, A165122, A165114, A165115, A165119, A165117, A165128.
In other bases: Empty (base 2), A165004 (base 3), A165023 (base 4), A165043 (base 5), A165062 (base 6), A165082 (base 7), A165101 (base 8), A164720 (base 10).

A165106 Consider the base-8 Kaprekar map x->K(x) described in A165090. Sequence gives the smallest number that belongs to a cycle of length n under repeated iteration of this map, or -1 if there is no cycle of length n.

Original entry on oeis.org

0, 17892, 1589, 21483, 1022, 7034104602, 1445787
Offset: 1

Views

Author

Joseph Myers, Sep 04 2009

Keywords

Comments

Known values (to 70 base-8 digits):
a(1) = 0 (base 10) = 0 (base 8)
a(2) = 17892 (base 10) = 42744 (base 8)
a(3) = 1589 (base 10) = 3065 (base 8)
a(4) = 21483 (base 10) = 51753 (base 8)
a(5) = 1022 (base 10) = 1776 (base 8)
a(6) = 7034104602 (base 10) = 64320765432 (base 8)
a(7) = 1445787 (base 10) = 5407633 (base 8)
a(9) = 467364965130 (base 10) = 6632107665412 (base 8)
a(12) = 29921040357642 (base 10) = 663321076654412 (base 8)

Links

Crossrefs

Cf. A165090, A165094, A165095, A165097, A165099, A165101.
In other bases: A153881 (base 2), A165008 (base 3), A165028 (base 4), A165047 (base 5), A165067 (base 6), A165086 (base 7), A165126 (base 9), A151959 (base 10).
Previous Showing 11-12 of 12 results.

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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