# A014434 (b-file synthesized from sequence entry) 0 1 1 5 2 5 3 30 4 80 5 405 6 1505 7 7255 8 31155 9 149455 10 688655 11 3334880 12 15965130 13 78294155 14 383599455 15 1903940030 16 9474093880 17 47514889255 18 239112929655 19 1209724381330 20 6140755848280 21 31294613247255 22 159963286607755 23 820204107625155 24 4216569874416955 25 21732350726100905