# A294782 (b-file synthesized from sequence entry) 0 1 1 4 2 12 3 36 4 100 5 268 6 704 7 1812 8 4600 9 11556 10 28788 11 71252 12 175452 13 430284 14 1051848 15 2564708 16 6240752 17 15161092 18 36784284 19 89155268 20 215911636 21 522543436 22 1263991824 23 3056244212 24 7387384808 25 17851786148 26 43130479748 27 104187860340 28 251648811212 29 607755975820 30 1467673342616