# A012662 (b-file synthesized from sequence entry) 0 1 1 0 2 1 3 6 4 21 5 100 6 957 7 8498 8 70217 9 762696 10 9950809 11 128378910 12 1775380893 13 28325140012 14 483428842197 15 8558590549322 16 163465935697169 17 3367220579004048 18 72712394227734577 19 1648059951297530166