A025627 Numbers of form 6^i*8^j, with i, j >= 0.

1, 6, 8, 36, 48, 64, 216, 288, 384, 512, 1296, 1728, 2304, 3072, 4096, 7776, 10368, 13824, 18432, 24576, 32768, 46656, 62208, 82944, 110592, 147456, 196608, 262144, 279936, 373248, 497664, 663552, 884736, 1179648, 1572864, 1679616, 2097152

Offset: 1

Author

David W. Wilson

Keywords

• easy
• nonn

Links

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

Crossrefs

Subsequence of A025610.

Programs

Mathematica

n = 10^6; Flatten[Table[6^i*8^j, {i, 0, Log[6, n]}, {j, 0, Log[8, n/6^i]}]] // Sort (* Amiram Eldar, Sep 26 2020 *)

Formula

Sum_{n>=1} 1/a(n) = (6*8)/((6-1)*(8-1)) = 48/35. - Amiram Eldar, Sep 26 2020

a(n) ~ exp(sqrt(2*log(6)*log(8)*n)) / sqrt(48). - Vaclav Kotesovec, Sep 26 2020

a(n) = 6^A025661(n) * 8^A025674(n). - R. J. Mathar, Jul 06 2025