# A005961 (b-file synthesized from sequence entry) 1 1 2 2 3 5 4 13 5 37 6 108 7 325 8 993 9 3070 10 9564 11 29979 12 94392 13 298311 14 945592 15 3005021 16 9570559 17 30539044 18 97611676 19 312462096 20 1001554565 21 3214232129 22 10326580526 23 33210135104 24 106901289420 25 344398593149 26 1110395171502 27 3582666470285 28 11567123373968