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 A193415 Numbers from A193414 written in base 2. 2

%I

%S 1,11,101,111,1001,1011,1101,1111,10001,10011,10111,11001,11011,11101,

%T 11111,100001,100011,100111,101111,110001,110011,110111,111001,111011,

%U 111101,111111,1000001,1000011,1000111,1001111,1011111,1100001,1100011,1100111,1101111

%N Numbers from A193414 written in base 2.

%C For n>1 the structure of digits represents a valley. The first digit is equal to the last digit (1). The first digits are in nonincreasing order. The last digits are in nondecreasing order. The numbers may have more 0 digits. Sequence is infinite.

%e Illustration using 67 = (1000011)_2:

%e 1 . . . . 1 1

%e . 0 0 0 0 . .

%Y Cf. A193413 (Valley numbers written in base 10).

%K nonn,base

%O 1,2

%A _Jaroslav Krizek_, Jul 25 2011

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Last modified October 15 20:04 EDT 2019. Contains 328037 sequences. (Running on oeis4.)