# A124710 (b-file synthesized from sequence entry) 0 1 1 17 2 49 3 113 4 301 5 797 6 2173 7 5981 8 16645 9 46661 10 131629 11 373181 12 1062481 13 3035777 14 8700601 15 25002473 16 72015925 17 207858677 18 601040317 19 1740812621 20 5049436441 21 14666136521 22 42649909681 23 124166516801 24 361855286617