# A228763 (b-file synthesized from sequence entry) 0 3 1 1 2 7 3 15 4 127 5 2047 6 262143 7 536870911 8 140737488355327 9 75557863725914323419135 10 10633823966279326983230456482242756607 11 803469022129495137770981046170581301261101496891396417650687