A038477 Sums of 5 distinct powers of 5.

781, 3281, 3781, 3881, 3901, 3905, 15781, 16281, 16381, 16401, 16405, 18781, 18881, 18901, 18905, 19381, 19401, 19405, 19501, 19505, 19525, 78281, 78781, 78881, 78901, 78905, 81281, 81381, 81401, 81405, 81881, 81901, 81905, 82001, 82005, 82025, 93781, 93881, 93901

Offset: 1

Author

Olivier Gérard

Keywords

• nonn
• easy

Links

• Amiram Eldar, Table of n, a(n) for n = 1..10000

Crossrefs

Base 5 interpretation of A038447.

Cf. A000351, A038474, A038475, A038476.

Programs

Mathematica

Union[Total[5^#]&/@Subsets[Range[0,8],{5}]] (* Harvey P. Dale, Nov 15 2012 *)

Python

from itertools import islice
def A038477_gen(): # generator of terms
    yield int(bin(n:=31)[2:],5)
    while True: yield int(bin((n:=n^((a:=-n&n+1)|(a>>1)) if n&1 else ((n&~(b:=n+(a:=n&-n)))>>a.bit_length())^b))[2:],5)
A038477_list = list(islice(A038477_gen(),30)) # Chai Wah Wu, Apr 05 2025

Extensions

Offset corrected by Amiram Eldar, Jul 13 2022