A244747 Positions at which powers of 2 occur in A051145.

1, 2, 3, 5, 6, 9, 12, 17, 29, 45, 48, 81, 105, 108, 177, 245, 323, 324, 569, 648, 893, 1277, 1296, 2121, 2592, 3221, 4853, 5184, 7697, 11015, 15333, 15552, 25841, 31104, 40157, 59213, 84239, 93312, 135107, 184679, 265277, 279936, 445029, 606509, 830411, 839808

Offset

1,2

Comments

A209229(A051145(a(n))) = 1;

the definition of this sequence was the original definition of A051147.

Links

Table of n, a(n) for n=1..46.

Rémy Sigrist, C++ program

Prog

(Haskell)
import Data.List (findIndices)
a244747 n = a244747_list !! (n-1)
a244747_list = findIndices ((== 1) . a209229) a051145_list
(C++)
See Links section.

Crossrefs

Cf. A209229, A051147 (subsequence).

Sequence in context: A292444 A035948 A258939 * A241742 A212584 A330228

Adjacent sequences: A244744 A244745 A244746 * A244748 A244749 A244750

Keyword

nonn

Author

Reinhard Zumkeller, Jul 05 2014

Extensions

More terms from Rémy Sigrist, Oct 09 2022

Status

approved