This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A144626 #2 Mar 30 2012 16:51:00 %S A144626 1,1,1,1,1,3,3,4,10,10,1,6,15,15,10,60,105,70,280,280,1,10,45,105,105, %T A144626 20,210,840,1260,280,2520,6300,2800,15400,15400,1,15,105,420,945,945, %U A144626 35,560,3780,12600,17325,840,12600,69300,138600,15400,184800,600600,200200,1401400,1401400 %N A144626 Tetrahedron of numbers T(i,j,k) = (i+2*j+3*k)!/(i!*j!*k!*2^j*6^k) read with entries in the order defined in A144625. %C A144626 The slice sums are given by A144416. %e A144626 The n-th slice of the tetrahedrom consists of the terms T(i,j,k) with i+j+k = n. %e A144626 Slices 0,1,2,3,4,5 are: %e A144626 ....................1 %e A144626 ------------------ %e A144626 ....................1 %e A144626 ...................1.1 %e A144626 ------------------ %e A144626 ....................10 %e A144626 ...................4.10 %e A144626 ..................1.3..3 %e A144626 ------------------ %e A144626 ...................280 %e A144626 ..................70.280 %e A144626 ................10.60.105 %e A144626 ...............1..6.15..15 %e A144626 ------------------ %e A144626 ..................15400 %e A144626 ................2800.15400 %e A144626 ...............280.2520.6300 %e A144626 .............20..210.840.1260 %e A144626 ............1..10..45..105.105 %e A144626 ------------------ %e A144626 .................1401400 %e A144626 .............200200.1401400 %e A144626 .........15400.184800...600600 %e A144626 ......840..12600..69300...138600 %e A144626 ...35....560....3780....12600...17325 %e A144626 1......15....105....420......945.....945 %Y A144626 Cf. A144416, A144625, A144385. %K A144626 nonn,tabf %O A144626 0,6 %A A144626 _N. J. A. Sloane_, Jan 18 2009, Jan 19 2009