# A237045 (b-file synthesized from sequence entry) 0 0 1 0 2 0 3 4 4 12 5 36 6 104 7 260 8 628 9 1448 10 3344 11 7464 12 16564 13 36180 14 78480 15 169232 16 362732 17 774172 18 1645508 19 3485788 20 7360208 21 15503432 22 32571360 23 68289536 24 142880552 25 298417848 26 622194236 27 1295266596 28 2692514348 29 5589496748 30 11588789220 31 23998902548