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A107764 Numbers of the form (8^i)*(13^j), with i, j >= 0. 6
1, 8, 13, 64, 104, 169, 512, 832, 1352, 2197, 4096, 6656, 10816, 17576, 28561, 32768, 53248, 86528, 140608, 228488, 262144, 371293, 425984, 692224, 1124864, 1827904, 2097152, 2970344, 3407872, 4826809, 5537792, 8998912, 14623232, 16777216 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

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

FORMULA

Sum_{n>=1} 1/a(n) = (8*13)/((8-1)*(13-1)) = 26/21. - Amiram Eldar, Sep 25 2020

a(n) ~ exp(sqrt(2*log(8)*log(13)*n)) / sqrt(104). - Vaclav Kotesovec, Sep 25 2020

MATHEMATICA

n = 10^6; Flatten[Table[8^i*13^j, {i, 0, Log[8, n]}, {j, 0, Log[13, n/8^i]}]] // Sort (* Amiram Eldar, Sep 25 2020 *)

CROSSREFS

Cf. A025633, A025634, A107326, A107364, A107462, A107466, A107710, A108056, A108090.

Sequence in context: A316527 A304546 A166670 * A306131 A177183 A228799

Adjacent sequences:  A107761 A107762 A107763 * A107765 A107766 A107767

KEYWORD

nonn,easy

AUTHOR

Douglas Winston (douglas.winston(AT)srupc.com), Jun 11 2005

STATUS

approved

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Last modified March 8 11:41 EST 2021. Contains 341948 sequences. (Running on oeis4.)