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A194357 Triangle of divisors of 6^n, each number occurring once. 5
1, 2, 3, 6, 4, 9, 12, 18, 36, 8, 24, 27, 54, 72, 108, 216, 16, 48, 81, 144, 162, 324, 432, 648, 1296, 32, 96, 243, 288, 486, 864, 972, 1944, 2592, 3888, 7776, 64, 192, 576, 729, 1458, 1728, 2916, 5184, 5832, 11664, 15552, 23328, 46656, 128, 384, 1152, 2187 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

T. D. Noe, Rows for n = 0..100

EXAMPLE

The triangle has rows beginning with 2^k and ending with 6^k:

  1

  2,  3,  6

  4,  9,  12, 18,  36

  8,  24, 27, 54,  72,  108, 216

  16, 48, 81, 144, 162, 324, 432, 648, 1296

MATHEMATICA

Join[{{1}}, Table[Complement[Divisors[6^n], Divisors[6^(n-1)]], {n, 9}]]

CROSSREFS

Cf. A194356 (divisors of 10^n), A194358 (divisors of 30^n).

Cf. A003586 (3-smooth numbers).

Sequence in context: A152679 A232561 A320123 * A165783 A289272 A073318

Adjacent sequences:  A194354 A194355 A194356 * A194358 A194359 A194360

KEYWORD

nonn,tabf

AUTHOR

T. D. Noe, Aug 25 2011

STATUS

approved

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Last modified October 21 14:04 EDT 2019. Contains 328299 sequences. (Running on oeis4.)