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 A061830 Multiples of 5 having only even digits. 2
 0, 20, 40, 60, 80, 200, 220, 240, 260, 280, 400, 420, 440, 460, 480, 600, 620, 640, 660, 680, 800, 820, 840, 860, 880, 2000, 2020, 2040, 2060, 2080, 2200, 2220, 2240, 2260, 2280, 2400, 2420, 2440, 2460, 2480, 2600, 2620, 2640, 2660, 2680, 2800, 2820, 2840 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS Harvey P. Dale, Table of n, a(n) for n = 0..1000 Index entries for linear recurrences with constant coefficients, signature (1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, -1). FORMULA a(0)=0, a(1)=20, a(2)=40, a(3)=60, a(4)=80, a(5)=200, a(6)=220, a(7)=240, a(8)=260, a(9)=280, a(10)=400, a(11)=420, a(12)=440, a(13)=460, a(14)=480, a(15)=600, a(16)=620, a(17)=640, a(18)=660, a(19)=680, a(20)=800, a(21)=820, a(22)=840, a(23)=860, a(24)=880, a(25)=2000, a(n)=a(n-1)+ a(n-25)- a(n-26). - Harvey P. Dale, Feb 24 2014 EXAMPLE 220 = 5*44 is a term having all even digits. MATHEMATICA Select[5*Range[0, 2000], And@@EvenQ[IntegerDigits[#]]&] (* or *) LinearRecurrence[ {1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, -1}, {0, 20, 40, 60, 80, 200, 220, 240, 260, 280, 400, 420, 440, 460, 480, 600, 620, 640, 660, 680, 800, 820, 840, 860, 880, 2000}, 50] (* Harvey P. Dale, Feb 24 2014 *) PROG (PARI) is(n)=n%10==0 && #setintersect(Set(digits(n)), [1, 3, 5, 7, 9])==0 \\ Charles R Greathouse IV, Feb 15 2017 CROSSREFS Cf. A061829. Sequence in context: A049057 A065607 A008602 * A235282 A270296 A338433 Adjacent sequences:  A061827 A061828 A061829 * A061831 A061832 A061833 KEYWORD nonn,base,easy AUTHOR Amarnath Murthy, May 29 2001 EXTENSIONS More terms from Larry Reeves (larryr(AT)acm.org), May 30 2001 STATUS approved

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Last modified June 15 15:16 EDT 2021. Contains 345049 sequences. (Running on oeis4.)