# A011854 (b-file synthesized from sequence entry) 0 0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 1 10 5 11 20 12 61 13 160 14 375 15 804 16 1608 17 3038 18 5469 19 9447 20 15746 21 25436 22 39971 23 61289 24 91933 25 135196 26 195284 27 277509 28 388513 29 536518 30 731615 31 986090 32 1314787 33 1735519 34 2269525 35 2941977