OFFSET
1,2
COMMENTS
FORMULA
T(n,k) = n*A237270(n,k).
EXAMPLE
The irregular triangle begins:
1;
6;
6, 6;
28;
15, 15;
72;
28, 28;
120;
45, 27, 45;
90, 90;
66, 66;
336;
91, 91;
168, 168;
120, 120, 120;
496;
153, 153;
702;
190, 190;
840;
231, 105, 105, 231;
...
For n = 9 the parts of the symmetric representation of sigma(9) are [5, 3, 5], so row 9 is [45, 27, 45].
CROSSREFS
KEYWORD
nonn,tabf
AUTHOR
Omar E. Pol, Jul 11 2014
STATUS
approved