# A036252 (b-file synthesized from sequence entry) 0 1 1 3 2 6 3 6 4 16 5 39 6 114 7 335 8 1081 9 3574 10 12408 11 44076 12 160915 13 598244 14 2263400 15 8681464 16 33713947 17 132305267 18 524095596 19 2093208435 20 8422013745 21 34110403728 22 138979989162 23 569339728312 24 2343898451275 25 9693334574919