# A002957 (b-file synthesized from sequence entry) 1 1 2 2 3 3 4 5 5 7 6 26 7 27 8 53 9 147 10 236 11 248 12 386 13 401 14 546 15 785 16 1325 17 1755 18 2906 19 3020 20 5407 21 5697 22 5969 23 7517 24 15749 25 19233 26 38232 27 55347 28 1059002