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A069026
Smallest power of 4 with digit sum n, or 0 if no such number exists.
0
1, 0, 0, 4, 0, 0, 16, 0, 0, 64, 0, 0, 256, 0, 0, 0, 0, 0, 4096, 0, 0, 16384, 0, 0, 65536, 0, 0, 0, 0, 0, 1048576, 0, 0, 0, 0, 0, 16777216, 0, 0, 67108864, 0, 0, 268435456, 0, 0, 4398046511104, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4294967296, 0, 0, 17179869184, 0, 0
OFFSET
1,4
COMMENTS
a(3k)=0. If any other zero terms are really nonzero, their value is greater than 4^31. - Larry Reeves (larryr(AT)acm.org), Dec 21 2002
CROSSREFS
Cf. A069025.
Sequence in context: A092219 A262227 A336731 * A133851 A062685 A192016
KEYWORD
nonn,base
AUTHOR
Amarnath Murthy, Apr 02 2002
EXTENSIONS
More terms from Larry Reeves (larryr(AT)acm.org), Dec 21 2002
STATUS
approved