A079806 Number of even numbers that can be formed by permuting the digits of n.

1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 2, 1, 1, 1, 2, 1, 2, 1, 2, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 2, 1, 2, 1, 1, 1, 2, 1, 2, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 2, 1, 2, 1, 2, 1, 1, 1, 2, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 2, 1, 2, 1, 2, 1

Offset

0,21

Comments

Derived sequences: (1) smallest k such that a(k) = n; (2) numbers m such that a(m) = m.

Links

Table of n, a(n) for n=0..85.

Example

a(246) = 6 (the numbers are 246,264,426,462,624,642). a(384) = 4 (the numbers are 384,348,438,834).

Mathematica

Table[Count[FromDigits/@Permutations[IntegerDigits[n]], _?EvenQ], {n, 0, 120}] (* Harvey P. Dale, Jul 25 2020 *)

Crossrefs

Sequence in context: A133162 A276172 A322028 * A342845 A045887 A056832

Adjacent sequences: A079803 A079804 A079805 * A079807 A079808 A079809

Keyword

base,easy,nonn

Author

Amarnath Murthy, Feb 06 2003

Extensions

More terms from Harvey P. Dale, Jul 25 2020

Status

approved