A099821 - OEIS

A099821

Odd positive integers in base 2 (bisection of A007088).

1, 11, 101, 111, 1001, 1011, 1101, 1111, 10001, 10011, 10101, 10111, 11001, 11011, 11101, 11111, 100001, 100011, 100101, 100111, 101001, 101011, 101101, 101111, 110001, 110011, 110101, 110111, 111001, 111011, 111101, 111111, 1000001

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OFFSET

1,2

COMMENTS

List of binary vectors that begin and end with 1.

LINKS

N. J. A. Sloane, Table of n, a(n) for n = 1..1000

Index entries for 2-automatic sequences.

MAPLE

seq(convert(2*n-1, binary), n=1..37); # Emeric Deutsch, Dec 15 2004

MATHEMATICA

FromDigits/@IntegerDigits[Range[1, 71, 2], 2] (* Harvey P. Dale, Apr 05 2019 *)

PROG

(PARI) a(n) = fromdigits(binary(2*n-1), 10); \\ Michel Marcus, Apr 23 2020

CROSSREFS

Cf. A007088, A099820.

Sequence in context: A072001 A265510 A265528 * A193415 A263609 A333415

Adjacent sequences: A099818 A099819 A099820 * A099822 A099823 A099824

KEYWORD

nonn,base,easy

AUTHOR

N. J. A. Sloane, Nov 19 2004

EXTENSIONS

More terms from Emeric Deutsch, Dec 15 2004

STATUS

approved