# A016876 (b-file synthesized from sequence entry) 0 16 1 2401 2 20736 3 83521 4 234256 5 531441 6 1048576 7 1874161 8 3111696 9 4879681 10 7311616 11 10556001 12 14776336 13 20151121 14 26873856 15 35153041 16 45212176 17 57289761 18 71639296 19 88529281 20 108243216 21 131079601