104247domain: NAppears in sequencesNumbers k such that k and k+1 have the same binary XOR of divisors.at n=43A227443Denominator/27 of hypergeom([n+1/2,1],[n+3],-3).at n=7A2274741-parking triangle T(r, i, 1) read by rows: T(r, i, k) = (r + 1)^(i-1)*binomial(k*(r + 1) + r - i - 1, r - i) with k = 1 and 0 <= i <= r.at n=39A329057