# A007142 (b-file synthesized from sequence entry) 1 1 2 3 3 15 4 73 5 387 6 2106 7 11998 8 69999 9 418104 10 2540368 11 15660843 12 97692822 13 615559931 14 3911866377 15 25044058215 16 161369414590 17 1045681767924 18 6810222330303 19 44552627690401 20 292642818035352 21 1929238465836366 22 12760620159195044