# A242510 (b-file synthesized from sequence entry) 0 1 1 2 2 3 3 8 4 15 5 32 6 67 7 138 8 289 9 600 10 1249 11 2600 12 5409 13 11258 14 23427 15 48752 16 101455 17 211128 18 439363 19 914322 20 1902721 21 3959600 22 8240001 23 17147600 24 35684481 25 74260082 26 154536643 27 321593688 28 669242575 29 1392706512 30 2898248707