# A025275 (b-file synthesized from sequence entry) 1 1 2 0 3 1 4 0 5 0 6 1 7 2 8 4 9 10 10 24 11 56 12 133 13 318 14 760 15 1822 16 4384 17 10576 18 25578 19 62020 20 150744 21 367220 22 896496 23 2193104 24 5375405 25 13199606 26 32468912 27 80000438 28 197423104 29 487921440 30 1207578750 31 2992704924 32 7426194328 33 18449964876 34 45890849360