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A361258
Irregular triangle read by rows in which row n lists the print order of a 4n-page booklet.
1
2, 3, 4, 1, 2, 7, 8, 1, 4, 5, 6, 3, 2, 11, 12, 1, 4, 9, 10, 3, 6, 7, 8, 5, 2, 15, 16, 1, 4, 13, 14, 3, 6, 11, 12, 5, 8, 9, 10, 7, 2, 19, 20, 1, 4, 17, 18, 3, 6, 15, 16, 5, 8, 13, 14, 7, 10, 11, 12, 9, 2, 23, 24, 1, 4, 21, 22, 3, 6, 19, 20, 5, 8, 17, 18, 7, 10, 15, 16, 9, 12, 13, 14, 11
OFFSET
1,1
COMMENTS
Row n is a permutation of the first 4*n positive integers.
LINKS
EXAMPLE
Triangle begins:
2, 3, 4, 1;
2, 7, 8, 1, 4, 5, 6, 3;
2, 11, 12, 1, 4, 9, 10, 3, 6, 7, 8, 5;
2, 15, 16, 1, 4, 13, 14, 3, 6, 11, 12, 5, 8, 9, 10, 7;
...
MAPLE
T:= n-> seq([2*m, 4*n-2*m+1, 4*n-2*m+2, 2*m-1][], m=1..n):
seq(T(n), n=1..6); # Alois P. Heinz, Mar 06 2023
CROSSREFS
Cf. A008586 (row lengths), A033585 (row sums).
Sequence in context: A163258 A357143 A337210 * A141063 A138223 A194742
KEYWORD
nonn,look,tabf
AUTHOR
STATUS
approved