For k >= 1, let b(k) = ceiling( Sum_{i=1..k} 1/i ); a(n) = number of b(k) that are equal to n.

A096005

For k >= 1, let b(k) = ceiling( Sum_{i=1..k} 1/i ); a(n) = number of b(k) that are equal to n.

Terms

    a(0) =0a(1) =1a(2) =2a(3) =7a(4) =20a(5) =52a(6) =144a(7) =389a(8) =1058a(9) =2876a(10) =7817a(11) =21250a(12) =57763a(13) =157017a(14) =426817a(15) =1160207a(16) =3153770a(17) =8572836a(18) =23303385a(19) =63345169a(20) =172190019a(21) =468061001a(22) =1272321714a(23) =3458528995a(24) =9401256521a(25) =25555264765a(26) =69466411833a(27) =188829284972

External references