Number of multisets that can be obtained by choosing a divisor of each positive integer from 1 to n.

A355747

Number of multisets that can be obtained by choosing a divisor of each positive integer from 1 to n.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =4a(4) =10a(5) =20a(6) =58a(7) =116a(8) =320a(9) =772a(10) =2170a(11) =4340a(12) =14112a(13) =28224a(14) =78120a(15) =212004a(16) =612232a(17) =1224464a(18) =3873760a(19) =7747520a(20) =24224608a(21) =64595088a(22) =175452168a(23) =350904336

External references