# A305561 (b-file synthesized from sequence entry) 0 1 1 1 2 3 3 8 4 23 5 64 6 182 7 512 8 1451 9 4096 10 11594 11 32768 12 92710 13 262144 14 741548 15 2097152 16 5931955 17 16777216 18 47454210 19 134217728 20 379628818 21 1073741824 22 3037013748 23 8589934592 24 24296051198 25 68719476736 26 194368201572 27 549755813888 28 1554944869676 29 4398046511104