Number of permutations p of (1,2,3,...,n) such that Sum_{k=1..n} (p(k) mod k) = n.

A073344

Number of permutations p of (1,2,3,...,n) such that Sum_{k=1..n} (p(k) mod k) = n.

Terms

    a(0) =0a(1) =0a(2) =2a(3) =7a(4) =23a(5) =105a(6) =386a(7) =1674a(8) =6121a(9) =25072a(10) =89070a(11) =391317a(12) =1432287a(13) =5414201a(14) =20125565a(15) =80661495a(16) =273257927a(17) =1073041080a(18) =3588277692a(19) =13732078994a(20) =49417761548a(21) =176544997915a(22) =551992576980

External references