p = p-2 + n*p-1

nbonacci.dart

nBonacci(num n, {num a = 0, num b = 1, int max = 10}) {
  var seq = <num>[a, b];
  for (int i = 0; i < max; i++) {
    seq.add(a + b*n);
    a = b;
    b = seq.last;
  }
  return seq;
}