a(n) equals the least sum of the squares of the coefficients in (1 + x^k + x^(2k) + x^p)^n found at sufficiently large p for some fixed k>0.
A186391
a(n) equals the least sum of the squares of the coefficients in (1 + x^k + x^(2k) + x^p)^n found at sufficiently large p for some fixed k>0.
Terms
- a(0) =1a(1) =4a(2) =32a(3) =340a(4) =4096a(5) =52704a(6) =705956a(7) =9717488a(8) =136443904a(9) =1945097296a(10) =28063032832a(11) =408836809088
External references
- oeis: A186391