# A019996 (b-file synthesized from sequence entry) 0 2 1 24 2 39 3 104 4 388 5 578 6 669 7 2746 8 2819 9 3013 10 5169 11 17398 12 19094 13 21359 14 23116 15 24950 16 48267 17 48487 18 105621 19 215513 20 4706574 21 16400064 22 106043719 23 137338247 24 243888200 25 478287113 26 673135223 27 3077440133 28 6453969104