OFFSET
0,3
COMMENTS
Sum_{k>0} k * T(n,k) = A247741(n).
LINKS
Alois P. Heinz, Rows n = 0..175, flattened
Wikipedia, Pentomino
EXAMPLE
T(3,2) = 1:
._____.
| ._. |
|_| |_|
|_. ._|
| |_| |
|_____| .
Triangle T(n,k) begins:
00 : 1;
01 : 1;
02 : 5;
03 : 39, 16, 1;
04 : 369, 120, 12;
05 : 2908, 1000, 98;
06 : 19185, 7474, 1228, 60, 3;
07 : 137200, 63896, 12448, 1092, 53;
08 : 1022915, 540562, 120034, 12676, 590, 4;
09 : 7606043, 4365686, 1084022, 140512, 8836, 250, 5;
10 : 55699672, 34738058, 9663366, 1466724, 124242, 5984, 166;
CROSSREFS
KEYWORD
nonn,tabf
AUTHOR
Alois P. Heinz, Sep 22 2014
STATUS
approved