OFFSET
1,2
COMMENTS
The sum of all terms in row m is (m+1)!/2. So a(m,n) = a(m-1,n) + m!/2, or is m!/2 if n=m.
Sum of m-th row = A001710(m+1). [Klaus Brockhaus, Jun 02 2009]
First column is A014288. - Franklin T. Adams-Watters, Oct 19 2013
EXAMPLE
Triangle starts:
1;
2, 1;
5, 4, 3;
17, 16, 15, 12;
77, 76, 75, 72, 60;
PROG
(Magma) S:=[1]; T:=S; for m in [2..9] do s:=&+T; T:=[ n lt m select T[n]+s else s: n in [1..m] ]; S:=S cat T; end for; S; // Klaus Brockhaus, Jun 02 2009
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Leroy Quet, Apr 26 2009
EXTENSIONS
More terms from Klaus Brockhaus, Jun 02 2009
STATUS
approved