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A194356 Triangle of divisors of 10^n, each number occurring once. 5
1, 2, 5, 10, 4, 20, 25, 50, 100, 8, 40, 125, 200, 250, 500, 1000, 16, 80, 400, 625, 1250, 2000, 2500, 5000, 10000, 32, 160, 800, 3125, 4000, 6250, 12500, 20000, 25000, 50000, 100000, 64, 320, 1600, 8000, 15625, 31250, 40000, 62500, 125000, 200000, 250000 (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 10^k:

  1

  2,  4,  10

  4,  20, 25,  50,  100

  8,  40, 125, 200, 250,  500,  1000

  16, 80, 400, 625, 1250, 2000, 2500, 5000, 10000

MATHEMATICA

Join[{{1}}, Table[Complement[Divisors[10^n], Divisors[10^(n-1)]], {n, 9}]]

CROSSREFS

Cf. A194357 (divisors of 6^n), A194358 (divisors of 30^n).

Cf. A003592 (numbers of the form 2^i*5^j).

Sequence in context: A177356 A078322 A252867 * A227317 A224300 A175467

Adjacent sequences:  A194353 A194354 A194355 * A194357 A194358 A194359

KEYWORD

nonn,tabf

AUTHOR

T. D. Noe, Aug 25 2011

STATUS

approved

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Last modified October 21 13:24 EDT 2019. Contains 328299 sequences. (Running on oeis4.)