# A097977 (b-file synthesized from sequence entry) 1 2 2 13 3 67 4 1151 5 9277 6 1616609 7 1874723 8 111546427 9 2751478721 10 862410107549 11 747543645019 12 3080843115635273 13 1006366256282297 14 2679162624135569701 15 166366498382137547479 16 993969333554296364249 17 8302567374394710807373