login
A161142
Numbers which can be expressed as the product of numbers made of only fours.
7
1, 4, 16, 44, 64, 176, 256, 444, 704, 1024, 1776, 1936, 2816, 4096, 4444, 7104, 7744, 11264, 16384, 17776, 19536, 28416, 30976, 44444, 45056, 65536, 71104, 78144, 85184, 113664, 123904, 177776, 180224, 195536, 197136, 262144, 284416, 312576
OFFSET
1,2
COMMENTS
64 = 4 * 4 * 4; 1936 = 44 * 44; 1776 = 4 * 444.
KEYWORD
nonn,base
AUTHOR
Claudio Meller, Jun 03 2009
EXTENSIONS
Corrected and extended by Claudio Meller, Jun 06 2009
Corrected and extended by Claudio Meller, Jun 27 2009
1 added by N. J. A. Sloane, Dec 04 2017
STATUS
approved