A025656 Exponent of 6 (value of j) in n-th number of form 2^i*6^j.

0, 0, 0, 1, 0, 1, 0, 1, 0, 2, 1, 0, 2, 1, 0, 2, 1, 3, 0, 2, 1, 3, 0, 2, 1, 3, 0, 2, 4, 1, 3, 0, 2, 4, 1, 3, 0, 2, 4, 1, 3, 5, 0, 2, 4, 1, 3, 5, 0, 2, 4, 1, 3, 5, 0, 2, 4, 6, 1, 3, 5, 0, 2, 4, 6, 1, 3, 5, 0, 2, 4, 6, 1, 3, 5, 0, 7, 2, 4, 6, 1, 3, 5, 0, 7, 2, 4, 6, 1, 3, 5, 0, 7, 2, 4, 6, 1, 8, 3, 5, 0, 7, 2, 4, 6, 1, 8, 3

Offset

1,10

Links

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

Formula

a(n) = A122841(A025610(n)). - Amiram Eldar, Nov 08 2025

Mathematica

seq[lim_] := IntegerExponent[Flatten[Table[2^i*6^j, {i, 0, Log2[lim]}, {j, 0, Log[6, lim/2^i]}]] // Sort, 6]; seq[10^7] (* Amiram Eldar, Nov 08 2025 *)

Crossrefs

Cf. A025610, A025636, A122841.

Sequence in context: A025857 A391911 A127788 * A194517 A110658 A002188

Adjacent sequences: A025653 A025654 A025655 * A025657 A025658 A025659

Keyword

nonn,easy

Author

David W. Wilson

Status

approved