# A142964 (b-file synthesized from sequence entry) 0 1 1 5 2 15 3 37 4 83 5 177 6 367 7 749 8 1515 9 3049 10 6119 11 12261 12 24547 13 49121 14 98271 15 196573 16 393179 17 786393 18 1572823 19 3145685 20 6291411 21 12582865 22 25165775 23 50331597 24 100663243 25 201326537 26 402653127 27 805306309 28 1610612675 29 3221225409 30 6442450879 31 12884901821