# A152284 (b-file synthesized from sequence entry) 0 1 1 1 2 1 3 4 4 9 5 56 6 295 7 1674 8 14273 9 121960 10 1101231 11 11444390 12 138031729 13 1718676948 14 22808373575 15 328417372906 16 5142373476225 17 85771047566384 18 1495194316452703 19 27487818332136270 20 535137393073675121