A025661 Exponent of 6 (value of i) in n-th number of form 6^i*8^j.

0, 1, 0, 2, 1, 0, 3, 2, 1, 0, 4, 3, 2, 1, 0, 5, 4, 3, 2, 1, 0, 6, 5, 4, 3, 2, 1, 0, 7, 6, 5, 4, 3, 2, 1, 8, 0, 7, 6, 5, 4, 3, 2, 9, 1, 8, 0, 7, 6, 5, 4, 3, 10, 2, 9, 1, 8, 0, 7, 6, 5, 4, 11, 3, 10, 2, 9, 1, 8, 0, 7, 6, 5, 12, 4, 11, 3, 10, 2, 9, 1, 8, 0, 7, 6, 13, 5, 12, 4, 11, 3, 10, 2, 9, 1, 8, 0, 7, 14, 6, 13

Offset

1,4

Links

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

Index entries for sequences which agree for a long time but are different.

Formula

a(n) = A122841(A025627(n)). - Amiram Eldar, Jul 09 2025

Mathematica

With[{max = 10^12}, IntegerExponent[Sort[Flatten[Table[6^i*8^j, {i, 0, Log[6, max]}, {j, 0, Log[8, max/6^i]}]]], 6]] (* Amiram Eldar, Jul 09 2025 *)

Crossrefs

Cf. A025627, A025674, A122841.

Differs from A025646 at a(1881).

Sequence in context: A025670 A122200 A025646 * A025671 A025652 A025662

Adjacent sequences: A025658 A025659 A025660 * A025662 A025663 A025664

Keyword

nonn

Author

David W. Wilson

Status

approved