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 A249981 #6 Jun 02 2025 10:16:40 %S A249981 16,154,1744,19574,237348,2886016,35380112,446342246,5529256528, %T A249981 70948896558,887325882364,11494042429460,144804789146232, %U A249981 1887744535279984,23911022925991996,313197804513008262 %N A249981 Number of length n+1 0..2*7 arrays with the sum of the absolute values of adjacent differences equal to n*7. %C A249981 Column 7 of A249982 %H A249981 R. H. Hardin, <a href="/A249981/b249981.txt">Table of n, a(n) for n = 1..210</a> %e A249981 Some solutions for n=4 %e A249981 ..8....6...11....2....6....6....7....4...14...11....2....1....6...12....8...12 %e A249981 ..2...10....5...13...13...10....2...13....2....2....0....9....8....8....5....9 %e A249981 ..9....6...14...10....3....1...14....4....0....0...13...14....5....2....9...11 %e A249981 ..4....0....8...14....2...11...13....8....2...14...14....3...14...10....0....0 %e A249981 .14...14....1....4...12....6....3....2...14...11....2....7....0....0...12...12 %K A249981 nonn %O A249981 1,1 %A A249981 _R. H. Hardin_, Nov 10 2014