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A050734 Numbers of form 4^k (values of k see A050725) containing no pair of consecutive equal digits (probably finite). 0
1, 4, 16, 64, 256, 1024, 4096, 16384, 1048576, 4194304, 268435456, 1073741824, 4294967296, 17179869184, 68719476736, 281474976710656, 18014398509481984, 72057594037927936, 73786976294838206464, 295147905179352825856, 1208925819614629174706176, 20282409603651670423947251286016, 85070591730234615865843651857942052864 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

No additional terms up to 4^25000. [From Harvey P. Dale, Oct 06 2011]

LINKS

Table of n, a(n) for n=0..22.

MATHEMATICA

Select[4^Range[0, 60], !MemberQ[Differences[IntegerDigits[#]], 0]&] (* Harvey P. Dale, Oct 06 2011 *)

CROSSREFS

Cf. A043096, A050725.

Sequence in context: A270142 A000302 A262710 * A075614 A083592 A069029

Adjacent sequences:  A050731 A050732 A050733 * A050735 A050736 A050737

KEYWORD

nonn,base

AUTHOR

Patrick De Geest, Sep 15 1999.

EXTENSIONS

Terms a(21), a(22), and a(23) added by Harvey P. Dale, Oct 06 2011

STATUS

approved

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Last modified October 19 05:01 EDT 2018. Contains 316336 sequences. (Running on oeis4.)