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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A061826 Multiples of 7 containing only even digits.

Original entry on oeis.org

0, 28, 42, 84, 224, 266, 280, 406, 420, 448, 462, 602, 644, 686, 826, 840, 868, 882, 2002, 2044, 2086, 2226, 2240, 2268, 2282, 2408, 2422, 2464, 2604, 2646, 2660, 2688, 2800, 2828, 2842, 2884, 4004, 4046, 4060, 4088, 4200, 4228, 4242, 4284, 4424, 4466, 4480
Offset: 1

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Author

Amarnath Murthy, May 28 2001

Keywords

Examples

			84 = 7*12 is a term.
		

Crossrefs

Cf. A061825.

Programs

  • Mathematica
    Select[7*Range[700],AllTrue[IntegerDigits[#],EvenQ]&] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Jan 04 2017 *)
  • PARI
    is(n)=n%7==0 && #setintersect(Set(digits(n)), [1,3,5,7,9])==0 \\ Charles R Greathouse IV, Feb 15 2017

Extensions

More terms from Larry Reeves (larryr(AT)acm.org), May 30 2001
a(1)=0 added by Georg Fischer, Feb 28 2023
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