# A074304 (b-file synthesized from sequence entry) 1 5 2 7 3 13 4 19 5 31 6 43 7 89 8 101 9 229 10 293 11 457 12 541 13 653 14 659 15 1553 16 2003 17 2707 18 2749 19 7159 20 10289 21 26267