

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.


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;
refs;
listen;
history;
text;
internal format)




