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A161142 Numbers which can be expressed as the product of numbers made of only fours. 7
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

64 = 4 * 4 * 4; 1936 = 44 * 44; 1776 = 4 * 444.

LINKS

Table of n, a(n) for n=1..37.

CROSSREFS

Cf. A084034, A161140, A161141, A161143, A161144, A161145, A161146, A161147.

Sequence in context: A227012 A034131 A183536 * A259013 A212960 A217873

Adjacent sequences:  A161139 A161140 A161141 * A161143 A161144 A161145

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

STATUS

approved

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Last modified July 22 05:05 EDT 2017. Contains 289648 sequences.