Very nice article! It might not be visually pleasing like your heatmaps above, but there are interesting number sequences to found in the sums of the anti-diagonals of the Pascal Matrix and other matrices derived from it. Using a small function to find the sums of the first n anti-diagonals of a square matrix: . start AntiDiagSum( x ); n = nrow( x ); s = sparse( x ); s[ , 2] = s[ , 2] + s[ , 3] - 1; return( full( s , 2#n - 1, n )[1:n , +] ); finish; . The following can all be derived: . print 'Fibonacci Numbers', (AntiDiagSum( PascalTriangle(12) ) ); print 'NegaFibonacci Numbers', (AntiDiagSum( inv( PascalTriangle(12) ) ) ); print 'Pell Numbers', (AntiDiagSum( PascalTriangle(12)**2 ) );