A007958 Even numbers with at least one odd digit.

10, 12, 14, 16, 18, 30, 32, 34, 36, 38, 50, 52, 54, 56, 58, 70, 72, 74, 76, 78, 90, 92, 94, 96, 98, 100, 102, 104, 106, 108, 110, 112, 114, 116, 118, 120, 122, 124, 126, 128, 130, 132, 134, 136, 138, 140, 142, 144, 146, 148, 150, 152, 154, 156, 158, 160, 162

Offset

1,1

Comments

Old name was: Even numbers such that some permutation of digits is an odd number.

a(n) = A179083(n) for n <= 30. - Reinhard Zumkeller, Jun 28 2010

Links

Michael S. Branicky, Table of n, a(n) for n = 1..10000

F. Smarandache, Only Problems, Not Solutions!

Index entries for 10-automatic sequences.

Formula

a(n) ~ 2n. - Charles R Greathouse IV, Oct 23 2015

Mathematica

Select[2*Range[100], Or@@OddQ[IntegerDigits[#]]&] (* Harvey P. Dale, Apr 01 2013 *)

Prog

(PARI) is(n)=n%2==0 && vecsum(Set(digits(n)%2)) \\ Charles R Greathouse IV, Oct 23 2015
(Python)
def ok(n): return n%2 == 0 and set(str(n)) & set("13579") != set()
print(list(filter(ok, range(163)))) # Michael S. Branicky, Oct 12 2021

Crossrefs

Sequence in context: A309539 A273492 A227870 * A179083 A375213 A092132

Adjacent sequences: A007955 A007956 A007957 * A007959 A007960 A007961

Keyword

nonn,base,easy

Author

R. Muller

Extensions

New name from Charles R Greathouse IV, Feb 14 2017, based on comment from Harvey P. Dale, Apr 01 2013

Status

approved