# A052255 (b-file synthesized from sequence entry) 0 1 1 13 2 81 3 345 4 1155 5 3267 6 8151 7 18447 8 38610 9 75790 10 140998 11 250614 12 428298 13 707370 14 1133730 15 1769394 16 2696727 17 4023459 18 5888575 19 8469175 20 11988405 21 16724565 22 23021505 23 31300425