OFFSET
1,2
COMMENTS
FORMULA
EXAMPLE
Row length l(n), degree values v(n).
l(n):=A207335(n): 3, 3, 2, 4, 1, 4, 5, 2, 3, 1, ...
v(n):=A207333(n): 1, 2, 3, 4, 5, 6, 8, 9, 10, 11, ...
n, v(n)\m 1 2 3 4 5 ...
1, 1: 1 2 3
2, 2: 4 5 6
3, 3: 7 9
4, 4: 8 10 12 15
5, 5: 11
6, 6: 13 14 18 21
7, 8: 16 17 20 24 30
8, 9: 19 27
9, 10: 22 25 33
10, 11: 23
...
a(4,2)=10 because C(10,x) has degree A207333(4)=4. In fact, C(10,x) = x^4-5*x^2+5.
The set {N:delta(N)=v(4)=4} = {8,10,12,15} (ordered increasingly). Exactly these N indices lead to degree 4
polynomials C.
CROSSREFS
KEYWORD
nonn,easy,tabf
AUTHOR
Wolfdieter Lang, Feb 19 2012
STATUS
approved