A274529 Total number of distinct numbers in the first n antidiagonals of infinite Sudoku-type array A269526.

1, 3, 4, 6, 6, 8, 10, 11, 13, 14, 16, 18, 18, 20, 20, 22, 22, 24, 26, 26, 27, 29, 30, 32, 35, 35, 38, 40, 40, 41, 43, 43, 43, 43, 47, 47, 47, 52, 53, 53, 54, 56, 58, 58, 60, 60, 60, 62, 64, 64, 67, 67, 68, 73, 74, 74, 74, 74, 77, 78, 78, 79, 80, 87, 87, 87, 87

Offset

1,2

Comments

a(n) is also the total number of distinct numbers in the first n antidiagonals of the square array A274528.

Links

Alois P. Heinz, Table of n, a(n) for n = 1..1000

Example

For n = 3, the first three antidiagonals of the square array A269526 are [1], [3, 2], [2, 4, 3]. The first four positive integers are in the list, so a(3) = 4.

Crossrefs

Cf. A269526, A274528, A274530.

Row lengths of A274534.

A275883 is closely related but a different sequence.

Sequence in context: A230300 A347318 A275883 * A284061 A162625 A033095

Adjacent sequences: A274526 A274527 A274528 * A274530 A274531 A274532

Keyword

nonn

Author

Omar E. Pol, Jun 30 2016

Extensions

More terms from Alois P. Heinz, Jun 30 2016

Status

approved