A105539 Matrix cube of triangle A105535 and, in this flattened form as read by rows, also equals diagonal 2 of A105535.

1, 3, 1, 9, 6, 1, 17, 15, 3, 1, 61, 92, 23, 28, 8, 138, 240, 62, 91, 28, 1, 238, 440, 115, 187, 58, 3, 1, 634, 1554, 404, 1256, 416, 43, 78, 27, 1421, 3915, 1009, 3784, 1266, 142, 291, 104, 1, 2707, 7933, 2023, 8486, 2848, 332, 756, 275, 6, 1, 4487, 13542, 3436, 15126

Offset

0,2

Comments

Diagonal n of triangular matrix A105535 equals A105535^(n+1) when flattened as read by rows.

Links

Table of n, a(n) for n=0..58.

Example

Triangle begins:
1;
3,1;
9,6,1;
17,15,3,1;
61,92,23,28,8;
138,240,62,91,28,1;
238,440,115,187,58,3,1;
634,1554,404,1256,416,43,78,27;
1421,3915,1009,3784,1266,142,291,104,1; ...

Prog

(PARI)

Crossrefs

Cf. A105535, A105538 (column 0).

Sequence in context: A112932 A337680 A077895 * A132819 A264364 A330509

Adjacent sequences: A105536 A105537 A105538 * A105540 A105541 A105542

Keyword

nonn,tabl

Author

Paul D. Hanna, Apr 12 2005

Status

approved