A261467 Where records occur in A261461.

0, 1, 2, 6, 12, 44, 92, 184, 1208, 1256, 4792, 9912, 19832, 39664, 563952, 576464, 4496112, 4499184, 17996528, 17997488, 143972080, 145057520, 145070832, 294967024, 589944560, 1179889136, 2359778272, 71079255008, 72019201952

Offset: 1

Author

Reinhard Zumkeller, Aug 30 2015

Keywords

• nonn
• more
• base

Comments

A261461(a(n)) = A261466(n).

Links

• Rémy Sigrist, C program

Crossrefs

Cf. A261461, A261466.

Programs

C

See Links section.

Haskell

a261467 n = a261467_list !! (n-1)
-- where a261467_list is defined in A261466.

Python

from itertools import count, islice
def f(n):
    b, k = bin(n)[2:], 1
    return next(k for k in count(1) if bin(k)[2:] not in b)
def agen(record=-1):
    yield from (((record:=f(k)), k)[1] for k in count(0) if f(k) > record)
print(list(islice(agen(), 18))) # Michael S. Branicky, Feb 26 2023

Extensions

Leading zero and more terms from Rémy Sigrist, Mar 10 2018

a(26)-a(29) from Rémy Sigrist, Feb 26 2023