A245135 Number of length 5 0..n arrays least squares fitting to a zero slope straight line, with a single point taken as having zero slope.
8, 39, 112, 275, 552, 1029, 1728, 2781, 4200, 6171, 8688, 11999, 16072, 21225, 27392, 34969, 43848, 54511, 66800, 81291, 97768, 116909, 138432, 163125, 190632, 221859, 256368, 295191, 337800, 385361, 437248, 494769, 557192, 625975, 700272, 781699
Offset: 1
Keywords
Examples
Some solutions for n=10 ..8....8....5....6....6....7....5....1....9....5....7....4....4....0....7....4 ..0....0....6....3....5....6....6....6....0....2....1....7...10....6....1....8 ..3....6....2....7....3....4....6....6...10....2....7....9....0....0....4....0 ..6....0...10....1....9....6....4....8....0...10....3....7....2....0....3....0 ..5....8....3....7....4....7....6....0....9....1....6....4....8....3....6....8
Links
- R. H. Hardin, Table of n, a(n) for n = 1..210
Formula
Empirical: a(n) = 2*a(n-1) +2*a(n-2) -6*a(n-3) +6*a(n-5) -2*a(n-6) -2*a(n-7) +a(n-8).
Empirical: G.f.: -x*(8+23*x+18*x^2+21*x^3+12*x^4-x^5-2*x^6+x^7) / ( (1+x)^3*(x-1)^5 ). - R. J. Mathar, Jul 12 2014
Comments