Expansion of tan(x)*cosh(x).A003719Expansion of tan(x)*cosh(x).Terms a(0) =1a(1) =5a(2) =41a(3) =685a(4) =19921a(5) =887765a(6) =56126201a(7) =4776869245a(8) =526589630881External referencesoeis: A003719