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Search: id:A143825
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A143825 This sequence displays every positive integer exactly three times; there is one number between the first and second 1's and one number between the second and third 1's; two numbers between the first and second 2's and two numbers between the second and third 2's; ... n numbers between the first and second n's and n numbers between the second and third n's. +0
1
1, 3, 1, 4, 1, 3, 5, 6, 4, 3, 8, 10, 5, 4, 6, 7, 9, 11, 5, 8, 13, 6, 10, 7, 2, 12, 9, 2, 8, 11, 2, 7, 14, 10, 13, 16, 9, 17, 12, 18, 15, 11, 20, 21, 22, 24, 19, 14, 13, 25, 23, 12, 16, 26, 27, 17, 15, 30, 18, 31, 28, 32, 14, 20, 34, 21, 19, 22, 33, 16, 24, 36, 15, 17, 23, 25, 35, 18, 37 (list; graph; listen)
OFFSET

1,2

COMMENT

The sequence displaying every positive integer exactly twice is A026272. Construction method: we always fill the next empty "hole" with the smallest available integer. There is no proof that this sequence could go on for ever. Terlms computed by Gilles Sadowski.

LINKS

Author?, Kimberlike sequences

CROSSREFS

Sequence in context: A090740 A094603 A165595 this_sequence A010602 A120731 A087477

Adjacent sequences: A143822 A143823 A143824 this_sequence A143826 A143827 A143828

KEYWORD

base,nonn

AUTHOR

Eric Angelini (eric.angelini(AT)skynet.be), Sep 02 2008

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.


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