# A321959 (b-file synthesized from sequence entry) 0 0 1 1 2 5 3 16 4 42 5 100 6 228 7 512 8 1144 9 2544 10 5616 11 12288 12 26656 13 57408 14 122944 15 262144 16 556928 17 1179392 18 2490112 19 5242880 20 11010560 21 23069696 22 48235520 23 100663296 24 209713152 25 436203520 26 905965568 27 1879048192 28 3892322304 29 8053080064 30 16643014656 31 34359738368