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A139410
Numbers n such that n = 4^d_1 + 4^d_2 + ... + 4^d_k where d_1d_2...d_k is the decimal expansion of n.
3
OFFSET
1,1
EXAMPLE
595968 = 4^5 + 4^9 + 4^5 + 4^9 + 4^6 + 4^8.
MATHEMATICA
Select[Range[596000], Total[4^IntegerDigits[#]]==#&] (* Harvey P. Dale, May 21 2021 *)
CROSSREFS
Sequence in context: A115446 A358445 A254850 * A031566 A236815 A343637
KEYWORD
base,fini,full,nonn,bref
AUTHOR
Farideh Firoozbakht, May 11 2008
STATUS
approved