# A356668 (b-file synthesized from sequence entry) 0 1 1 1 2 3 3 7 4 37 5 121 6 1141 7 5041 8 60761 9 378001 10 5444461 11 39916801 12 729041545 13 6227020801 14 130767460825 15 1321314894901 16 31388220966961 17 355687428096001 18 9636906872926477 19 121645100408832001 20 3649432697160095561 21 51223991519836175041 22 1686001091666419279753