Bessel polynomial {y_n}'(4).A065922Bessel polynomial {y_n}'(4).Terms a(0) =0a(1) =1a(2) =27a(3) =846a(4) =32290a(5) =1472535a(6) =78444261a(7) =4789283212a(8) =329976556596External referencesoeis: A065922