# A005850 (b-file synthesized from sequence entry) 1 3 2 5 3 7 4 19 5 29 6 47 7 59 8 163 9 257 10 421 11 937 12 947 13 1493 14 1901 15 6689 16 8087 17 9679 18 28753 19 79043 20 129127 21 145969 22 165799 23 168677 24 170413 25 172243