A300571 a(n) is the concatenation n in base 2, n-1 in base 2, ..., 0 in base 2.

0, 10, 1010, 111010, 100111010, 101100111010, 110101100111010, 111110101100111010, 1000111110101100111010, 10011000111110101100111010, 101010011000111110101100111010, 1011101010011000111110101100111010, 11001011101010011000111110101100111010

Offset: 0

Author

Seiichi Manyama, Mar 08 2018

Keywords

• nonn
• base

Links

• Seiichi Manyama, Table of n, a(n) for n = 0..155

Crossrefs

Cf. A007088, A058935, A300570.

Programs

Python

from functools import reduce
def A300571(n): return int(bin(reduce(lambda i,j:(i<Chai Wah Wu, Feb 26 2023

Formula

a(n) = A300570(n)*10. - Chai Wah Wu, Feb 26 2023