OFFSET
0,3
COMMENTS
Sum_{k>0} k * T(n,k) = A247738(n).
LINKS
Alois P. Heinz, Rows n = 0..160, flattened
Wikipedia, Pentomino
EXAMPLE
T(3,1) = 8:
._____. .___._.
| ._. | | ._| |
|_| |_| | | ._|
| ._| | | | | |
| | | |_|_| |
|_|___| (*4) |_____| (*4) .
Triangle T(n,k) begins:
00 : 1;
01 : 1;
02 : 5;
03 : 48, 8;
04 : 423, 68, 10;
05 : 3082, 832, 84, 8;
06 : 18998, 7624, 1230, 88, 10;
07 : 133083, 65360, 14390, 1732, 116, 8;
08 : 965175, 555236, 150876, 23184, 2196, 108, 6;
CROSSREFS
KEYWORD
nonn,tabf
AUTHOR
Alois P. Heinz, Sep 22 2014
STATUS
approved