# A007288 (b-file synthesized from sequence entry) 0 1 1 3 2 7 3 19 4 49 5 127 6 321 7 813 8 2041 9 5117 10 12763 11 31791 12 78917 13 195677 14 483997 15 1196081 16 2950439 17 7271905