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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A061817 Multiples of 9 containing only odd digits.

Original entry on oeis.org

9, 99, 117, 135, 153, 171, 315, 333, 351, 513, 531, 711, 999, 1179, 1197, 1359, 1377, 1395, 1539, 1557, 1575, 1593, 1719, 1737, 1755, 1773, 1791, 1917, 1935, 1953, 1971, 3159, 3177, 3195, 3339, 3357, 3375, 3393, 3519, 3537, 3555, 3573, 3591, 3717, 3735
Offset: 1

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Author

Amarnath Murthy, May 28 2001

Keywords

Examples

			117 = 9*13 is a term.
		

Crossrefs

Subsequence of A014261.

Programs

  • Mathematica
    Select[9Range[500],And@@OddQ[IntegerDigits[#]]&] (* Harvey P. Dale, May 30 2013 *)
  • PARI
    is(n)=n%9==0 && #setintersect(Set(digits(n)), [0,2,4,6,8])==0 \\ Charles R Greathouse IV, Feb 15 2017

Extensions

Corrected and extended by Larry Reeves (larryr(AT)acm.org), May 30 2001
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