A105545 Matrix cube of triangle A105540 and, in this flattened form as read by rows, also equals column 2 of A105540.

1, 3, 1, 9, 6, 1, 21, 21, 9, 1, 51, 54, 39, 12, 1, 142, 165, 111, 63, 15, 1, 325, 507, 387, 198, 93, 18, 1, 722, 1010, 1332, 753, 321, 129, 21, 1, 1909, 3346, 2427, 2905, 1299, 486, 171, 24, 1, 3507, 6972, 10724, 4954, 5586, 2061, 699, 219, 27, 1, 9110, 15290

Offset

0,2

Comments

Triangular matrix A105540 has the property that column n equals A105540^(n+1) when flattened as read by rows.

Links

Table of n, a(n) for n=0..56.

Example

Triangle begins:
1;
3,1;
9,6,1;
21,21,9,1;
51,54,39,12,1;
142,165,111,63,15,1;
325,507,387,198,93,18,1;
722,1010,1332,753,321,129,21,1;
1909,3346,2427,2905,1299,486,171,24,1;
3507,6972,10724,4954,5586,2061,699,219,27,1; ...

Crossrefs

Cf. A105540, A105542.

Sequence in context: A132819 A264364 A330509 * A178831 A027465 A164942

Adjacent sequences: A105542 A105543 A105544 * A105546 A105547 A105548

Keyword

nonn,tabl

Author

Paul D. Hanna, Apr 13 2005

Status

approved