# A048367 (b-file synthesized from sequence entry) 1 3 2 28 3 138 4 587 5 612 6 2824 7 27654 8 29603 9 131468 10 1312748 11 1616488 12 2811574 13 49629974 14 139796852 15 281986403 16 1264554822 17 6146857824 18 16162692208 19 60598584603 20 229717543765 21 606069984352 22 2811738231378 23 5869673191741