a(n) equals the least sum of the squares of the coefficients in (1 + 2*x^k + x^p + x^q)^n found at sufficiently large p and q>(n+1)p for some fixed k>0.
A186377
a(n) equals the least sum of the squares of the coefficients in (1 + 2*x^k + x^p + x^q)^n found at sufficiently large p and q>(n+1)p for some fixed k>0.
Terms
- a(0) =1a(1) =7a(2) =79a(3) =1129a(4) =18559a(5) =333577a(6) =6365089a(7) =126652183a(8) =2598628543a(9) =54577439833
External references
- oeis: A186377