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.
(-1)^j*2^(n - k - j)*binomial(n + 1, j)*binomial(2*n - j - k, n)). - _Detlef Meya's wiki page.
(-1)^j*2^(n - k - j)*binomial(n + 1, j)*binomial(2*n - j - k, n)). - _Detlef Meya has authored 0 sequences.