# A007198 (b-file synthesized from sequence entry) 1 1 2 3 3 12 4 52 5 238 6 1125 7 5438 8 26715 9 132871 10 667312 11 3377906 12 17210522 13 88169685 14 453810095 15 2345209383 16 12162367228 17 63270384303