# A000506 (b-file synthesized from sequence entry) 6 61 7 841 8 7311 9 51663 10 325446 11 1910706 12 10715506 13 58258210 14 309958755 15 1623847695 16 8412276585 17 43220104041 18 220683627988 19 1121561317408 20 5679711010548 21 28683869195556 22 144552802373145 23 727271783033445