A062033 Binary expansion of n does not contain 1-bits at even positions. Integers whose base 4 representation consists of only 0's and 2s.

0, 10, 1000, 1010, 100000, 100010, 101000, 101010, 10000000, 10000010, 10001000, 10001010, 10100000, 10100010, 10101000, 10101010, 1000000000, 1000000010, 1000001000, 1000001010, 1000100000, 1000100010, 1000101000, 1000101010, 1010000000, 1010000010, 1010001000

Offset: 0

Author

Antti Karttunen, Jun 26 2001

Keywords

• nonn
• base

Crossrefs

Decimal representation is given in A062880.

Cf. A063010.

Programs

Python

def A062033(n): return int(bin(int(bin(n)[2:],4))[2:])*10 # Chai Wah Wu, Aug 21 2023

Extensions

More terms from Chai Wah Wu, Aug 22 2023