# A097112 (b-file synthesized from sequence entry) 0 1 1 4 2 13 3 40 4 157 5 400 6 1813 7 4000 8 20317 9 40000 10 222853 11 400000 12 2405677 13 4000000 14 25651093 15 40000000 16 270859837 17 400000000 18 2837738533 19 4000000000 20 29539646797 21 40000000000 22 305856821173 23 400000000000 24 3152711390557