A079838 a(1) = 1 and then smallest multiple of a(n) which has no nonzero digit in common with a(n).

1, 2, 4, 8, 16, 32, 64, 128, 640, 1280, 6400

Offset

0,2

Comments

The sequence is infinite and the pattern is visible after a(7): a(2n) = 2*a(2n-1) and a(2n+1) = 5*a(2n) n > 3.

Links

Table of n, a(n) for n=0..10.

Crossrefs

Cf. A079839.

Sequence in context: A264791 A290851 A290670 * A109912 A079845 A278995

Adjacent sequences: A079835 A079836 A079837 * A079839 A079840 A079841

Keyword

base,nonn

Author

Amarnath Murthy, Feb 15 2003

Status

approved