A161603 - OEIS

A161603

Odd terms of sequence A161602.

13, 25, 29, 41, 49, 53, 57, 59, 61, 81, 89, 97, 101, 105, 109, 113, 115, 117, 121, 123, 125, 145, 161, 169, 177, 181, 185, 193, 197, 201, 205, 209, 211, 213, 217, 221, 225, 227, 229, 233, 235, 237, 241, 243, 245, 247, 249, 251, 253, 289, 305

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Table of n, a(n) for n=1..51.

EXAMPLE

29 in binary is 11101. Its digital reversal is 10111, which is 23 in decimal. Since 29 > 23, and since 29 is odd, 29 is in this sequence.

MATHEMATICA

Select[Range[1, 311, 2], #>FromDigits[Reverse[IntegerDigits[#, 2]], 2]&] (* Harvey P. Dale, Feb 20 2013 *)

PROG

(Python)

from itertools import count, islice

def A161603_gen(startvalue=1): # generator of terms >= startvalue

return filter(lambda n:n>int(bin(n)[-1:1:-1], 2), count(max(startvalue|1, 1), 2))

A161603_list = list(islice(A161603_gen(), 20)) # Chai Wah Wu, Jan 19 2023

CROSSREFS

Cf. A030101, A006995, A161601, A161602.

Sequence in context: A186403 A032478 A280925 * A075033 A017533 A309809

Adjacent sequences: A161600 A161601 A161602 * A161604 A161605 A161606

KEYWORD

base,nonn

AUTHOR

Leroy Quet, Jun 14 2009

EXTENSIONS

More terms from Max Alekseyev, Dec 10 2011

STATUS

approved