# A036440 (b-file synthesized from sequence entry) 1 1 2 1 3 1 4 1 5 1 6 1 7 2 8 4 9 7 10 24 11 80 12 216 13 648 14 1304 15 3392 16 13808 17 59448 18 155464 19 480728 20 1588162 21 5626309 22 28279112 23 157469880 24 842498189 25 4998554801 26 28466978744 27 166572523589 28 1020487969891 29 5753385660978