113836841041domain: NAppears in sequencesBessel polynomial y_n(-1).at n=12A000806Write exp(sqrt(1+x)-1) = Sum c(n) x^n/n!; then a(n) = numerator of c(n).at n=13A101683Number of loopless linear chord diagrams with n chords.at n=12A278990Number of maximum matchings in the n-path complement graph.at n=23A302750