|
|
A292994
|
|
Number of integers m, 1 <= m <= A002569(n), that are not terms in the triangle T(n,k) of A008284.
|
|
0
|
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 4, 6, 8, 12, 19, 26, 39, 52, 71, 92, 120, 161, 205, 258, 320, 398, 499, 613, 754, 911, 1103, 1340, 1622, 1956, 2338, 2789, 3303, 3938, 4690, 5547, 6551, 7690, 9018, 10584, 12425, 14559, 16989, 19790, 22970, 26615
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,13
|
|
LINKS
|
|
|
EXAMPLE
|
With n = 10, the maximum value of m is 9 and all values of m from 1 to 9 appear within the first 10 rows of A008284, so a(10) = 0.
With n = 13, the maximum value of m is 18 and all values of m from 1 to 18, except 16 and 17, appear within the first 13 rows of A008284, so a(13) = 2.
|
|
MATHEMATICA
|
FoldList[{#1, Count[Range@ Max@ #2, k_ /; FreeQ[#1, k]]} & @@ {Append[#1, #2], #2} & @@ {First@ #1, Table[SeriesCoefficient[1/QPochhammer[a q, q], {q, 0, #2}, {a, 0, k}], {k, #2}]} &, {{{1}}, 0}, Range[2, 40]][[All, -1]] (* Michael De Vlieger, Sep 29 2017, after Vladimir Reshetnikov at A008284 *)
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|