# A015162 (b-file synthesized from sequence entry) 0 1 1 0 2 1326 3 31552 4 240618 5 1452480 6 5030028 7 18128256 8 43527174 9 119299200 10 232127928 11 537564480 12 910537442 13 1881950592 14 2894860164 15 5501926784 16 7880557842 17 14072683776 18 19054928890 19 32409323328 20 42013951980 21 68622996416 22 85866810348 23 135824277120 24 164834073388 25 253845438336 26 300583037448