cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

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A377413 a(n) is the least term of A126684 of the form k*n with k > 0.

Original entry on oeis.org

0, 1, 2, 21, 4, 5, 42, 21, 8, 81, 10, 341, 84, 65, 42, 1365, 16, 17, 162, 1045, 20, 21, 682, 69, 168, 325, 130, 81, 84, 261, 2730, 341, 32, 1089, 34, 1365, 324, 4181, 2090, 273, 40, 1025, 42, 5461, 1364, 5445, 138, 20821, 336, 1029, 650, 4437, 260, 5141, 162
Offset: 0

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Author

Rémy Sigrist, Oct 27 2024

Keywords

Examples

			The first terms, in decimal and in binary, are:
  n   a(n)  bin(a(n))
  --  ----  ---------
   0     0          0
   1     1          1
   2     2         10
   3    21      10101
   4     4        100
   5     5        101
   6    42     101010
   7    21      10101
   8     8       1000
   9    81    1010001
  10    10       1010
  11   341  101010101
  12    84    1010100
		

Crossrefs

See A300889 for a similar sequence.

Formula

a(n) = A377412(n)*n.
a(n) >= A300889(n) for any n > 0.
a(n) = n iff n belongs to A126684.
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