A361258 Irregular triangle read by rows in which row n lists the print order of a 4n-page booklet.

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

Alois P. Heinz, Rows n = 1..100, flattened

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

Adjacent sequences: A361255 A361256 A361257 * A361259 A361260 A361261

Keyword

nonn,look,tabf

Author

Ole Palnatoke Andersen, Mar 06 2023

Status

approved