Number of strings of numbers x(i=1..n) in 0..7 with sum i^3*x(i) equal to n^3*7.

A184255

Number of strings of numbers x(i=1..n) in 0..7 with sum i^3*x(i) equal to n^3*7.

Terms

    a(0) =1a(1) =1a(2) =3a(3) =8a(4) =33a(5) =152a(6) =739a(7) =3504a(8) =16444a(9) =76185a(10) =346668a(11) =1550082a(12) =6808688a(13) =29379874a(14) =124602206a(15) =519645017a(16) =2132308133a(17) =8614314587a(18) =34283560541a(19) =134495527119a(20) =520403471407

External references