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A333964 Numbers of the form 2^i * 6^j * 30^k * 210^m where i, j, k, m >= 0. 1
1, 2, 4, 6, 8, 12, 16, 24, 30, 32, 36, 48, 60, 64, 72, 96, 120, 128, 144, 180, 192, 210, 216, 240, 256, 288, 360, 384, 420, 432, 480, 512, 576, 720, 768, 840, 864, 900, 960, 1024, 1080, 1152, 1260, 1296, 1440, 1536, 1680, 1728, 1800, 1920, 2048, 2160, 2304, 2520, 2592 (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) = 15120/6061. - Amiram Eldar, Feb 18 2021

MATHEMATICA

mx = 2600; Select[Sort[Flatten[Table[2^i*6^j*30^k*210^m, {i, 0, Log[2, mx]}, {j, 0, Log[6, mx]}, {k, 0, Log[30, mx]}, {m, 0, Log[210, mx]}]]], # <= mx &] (* Amiram Eldar, Apr 24 2020 after Robert G. Wilson v at A279537 *)

CROSSREFS

Intersection of A025487 and A002473.

Cf. A025610, A279537.

Sequence in context: A324850 A095810 A025487 * A279537 A325238 A344385

Adjacent sequences:  A333961 A333962 A333963 * A333965 A333966 A333967

KEYWORD

nonn

AUTHOR

David A. Corneth, Apr 20 2020

STATUS

approved

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Last modified July 27 10:13 EDT 2021. Contains 346304 sequences. (Running on oeis4.)