# A054228 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 2 4 6 5 10 6 19 7 32 8 61 9 109 10 203 11 381 12 723 13 1371 14 2623 15 5040 16 9711 17 18781 18 36405 19 70710 20 137603 21 268242 22 523655 23 1023567 24 2002923 25 3923596 26 7693084 27 15097117 28 29649512 29 58271080 30 114596811 31 225504427 32 443998492 33 874651263 34 1723852015