# A132402 (b-file synthesized from sequence entry) 0 1 1 3 2 7 3 15 4 32 5 70 6 156 7 348 8 768 9 1672 10 3600 11 7696 12 16384 13 34784 14 73664 15 155584 16 327680 17 688256 18 1442048 19 3014912 20 6291456 21 13106688 22 27261952 23 56622080 24 117440512 25 243271680 26 503320576 27 1040191488 28 2147483648