# A139288 (b-file synthesized from sequence entry) 1 4 2 16 3 256 4 4096 5 1048576 6 16777216 7 4294967296 8 68719476736 9 17592186044416 10 72057594037927936 11 1152921504606846976 12 4722366482869645213696 13 1208925819614629174706176 14 19342813113834066795298816