A081432 - OEIS

A081432

RevDecimal(RevBinary(n)), where RevDecimal(m) is the decimal reversal of m (A004086) and RevBinary(m) is the binary reversal of m (A030101).

0, 1, 1, 3, 1, 5, 3, 7, 1, 9, 5, 31, 3, 11, 7, 51, 1, 71, 9, 52, 5, 12, 31, 92, 3, 91, 11, 72, 7, 32, 51, 13, 1, 33, 71, 94, 9, 14, 52, 75, 5, 73, 12, 35, 31, 54, 92, 16, 3, 53, 91, 15, 11, 34, 72, 95, 7, 93, 32, 55, 51, 74, 13, 36, 1, 56, 33, 79, 71, 18, 94, 311, 9, 37, 14

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OFFSET

0,4

LINKS

Harvey P. Dale, Table of n, a(n) for n = 0..1000

FORMULA

a(n) = A004086(A030101(n)). - Michel Marcus, Jan 30 2023

MATHEMATICA

IntegerReverse[IntegerReverse[Range[0, 80], 2]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Oct 03 2017 *)

PROG

(Python)

def a(n): return int(str(int(bin(n)[:1:-1], 2))[::-1])