A069026 Smallest power of 4 with digit sum n, or 0 if no such number exists.

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

Links

Table of n, a(n) for n=1..63.

Crossrefs

Cf. A069025.

Sequence in context: A092219 A262227 A336731 * A133851 A062685 A192016

Adjacent sequences: A069023 A069024 A069025 * A069027 A069028 A069029

Keyword

nonn,base

Author

Amarnath Murthy, Apr 02 2002

Extensions

More terms from Larry Reeves (larryr(AT)acm.org), Dec 21 2002

Status

approved