# A056413 (b-file synthesized from sequence entry) 1 5 2 15 3 35 4 120 5 201 6 1505 7 2015 8 14070 9 37085 10 246753 11 445515 12 5205790 13 7832185 14 72703645 15 254689657 16 1196213445 17 2805046965 18 35322811755 19 55770979195 20 596439735024 21 1892294578755 22 10837223014665 23 23559159229935 24 310484619147940 25 596046508875701 26 4776013513099405 27 15330413466776835 28 110874578286500410