A376904 Inverse permutation to A376903.

1, 2, 4, 3, 11, 5, 26, 8, 6, 12, 82, 7, 97, 27, 13, 9, 202, 17, 244, 10, 28, 83, 424, 18, 14, 98, 46, 29, 664, 15, 741, 38, 84, 203, 16, 19, 1182, 245, 99, 39, 1416, 20, 1584, 85, 47, 425, 1923, 21, 30, 62, 204, 100, 2463, 22, 86, 31, 246, 665, 3354, 23, 3723

Offset

1,2

Links

Rémy Sigrist, Table of n, a(n) for n = 1..10000

Rémy Sigrist, C++ program

Index entries for sequences that are permutations of the natural numbers

Example

A376903(42) = 88, so a(88) = 42.

Prog

(C++) // See Links section.
(Python)
from itertools import count, islice
def agen(): # generator of terms; uses A376903gen() in A376903
    adict, n = dict(), 1
    for k, v in enumerate(A376903gen(), 1):
        if v not in adict:
            adict[v] = k
            while n in adict: yield adict[n]; n += 1
print(list(islice(agen(), 61))) # Michael S. Branicky, Oct 16 2024

Crossrefs

Cf. A376903.

Sequence in context: A093839 A248981 A096780 * A332454 A143986 A059662

Adjacent sequences: A376901 A376902 A376903 * A376905 A376906 A376907

Keyword

nonn

Author

Rémy Sigrist, Oct 09 2024

Status

approved