# A016877 (b-file synthesized from sequence entry) 0 32 1 16807 2 248832 3 1419857 4 5153632 5 14348907 6 33554432 7 69343957 8 130691232 9 229345007 10 380204032 11 601692057 12 916132832 13 1350125107 14 1934917632 15 2706784157 16 3707398432 17 4984209207 18 6590815232