A114595 Triangle of the numbers of unique-valued sequences of all lengths (from 1 to 2n-1) consisting of unit matrices (="matrix units") of order n.

1, 4, 6, 4, 9, 24, 48, 60, 30, 16, 60, 192, 480, 840, 840, 336, 25, 120, 520, 1920, 5700, 12600, 18480, 15120, 5040, 36, 210, 1140, 5520, 22920, 78120, 206640, 393120, 483840, 332640, 95040

Offset

1,2

Comments

First entry of each row is obviously n^2 and the last entries of each row are the terms of A001761.

Links

Table of n, a(n) for n=1..36.

A. Blazhevski and P. Sokoloski, Conceptual Introduction to Unique-valued Sequences, Proceedings of the III Congress of Mathematicians of Macedonia (2005), preprint.

Aleksandar Blazhevski - Cane, First 10 rows [Broken link]

Example

T(n,1) = a(n^2 - 2n) = n^2.

Crossrefs

Cf. A097635, A001761.

Sequence in context: A088739 A088740 A088738 * A256415 A349093 A143545

Adjacent sequences: A114592 A114593 A114594 * A114596 A114597 A114598

Keyword

nonn,tabl

Author

Aleksandar Blazhevski - Cane (CaneB(AT)MT.Net.Mk), Dec 12 2005

Status

approved