292743domain: NAppears in sequencesEquivalent of the Kurepa hypothesis for left factorial.at n=7A052201Number of permutations of length n which avoid the patterns 2314, 3421, 4123.at n=12A116812Rectified 8-simplex numbers: the coefficient of x^(2n-2) in (1+x+x^2+...+x^(n-1))^9.at n=8A179099