# A153008 (b-file synthesized from sequence entry) 0 0 1 0 2 0 3 1 4 5 5 21 6 81 7 302 8 1107 9 4027 10 14608 11 52988 12 192501 13 701065 14 2560806 15 9384273 16 34504203 17 127288011 18 471102318 19 1749063906 20 6513268401 21 24323719461 22 91081800417 23 341929853235 24 1286711419527 25 4852902998951 26 18341683253676