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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A085135 Numbers whose cyclic permutations are all 7-smooth (A002473).

Original entry on oeis.org

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 18, 20, 21, 24, 27, 30, 36, 40, 42, 45, 48, 50, 54, 60, 63, 70, 72, 80, 81, 84, 90, 100, 108, 200, 243, 300, 324, 400, 405, 432, 450, 486, 500, 504, 540, 567, 600, 648, 675, 700, 756, 800, 810, 864, 900, 1000, 1008, 2000, 3000, 4000
Offset: 1

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Author

Amarnath Murthy and Meenakshi Srikanth (menakan_s(AT)yahoo.com), Jul 06 2003

Keywords

Comments

Sequence is infinite with trivial terms of the form k*10^r, k = 1 to 9. Conjecture: There are finitely many nontrivial terms (not of the form k*10^r). All the two-digit terms are the same as those of A085133.

Examples

			243 is a term as 243, 432 and 324 all are terms of A002473. 243 = 3^5, 432 = 2^4*3^3, 324 = 2^2*3^4.

Crossrefs

Cf. A002473, A005349, A085133.

Extensions

More terms from David Wasserman, Jan 28 2005
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