# A259816 (b-file synthesized from sequence entry) 1 4 2 12 3 64 4 160 5 676 6 1732 7 6440 8 16688 9 57620 10 150580 11 494776 12 1301208 13 4126100 14 10903692 15 33663256 16 89287024 17 269997636 18 718153380 19 2136075840 20 5693969456 21 16710504036 22 44618212196