OFFSET
0,19
LINKS
Alois P. Heinz, Antidiagonals n = 0..140, flattened
Paul D. Hanna et al., Formula Needed for a Family of Continued Fractions and follow-up messages on the SeqFan list, Jul 28 2013
EXAMPLE
Square array A(n,m) begins:
1, 1, 1, 1, 1, 1, 1, 1, 1, ...
1, 1, 1, 1, 1, 1, 1, 1, 1, ...
0, 1, 1, 1, 1, 1, 1, 1, 1, ...
0, 1, 2, 2, 2, 2, 2, 2, 2, ...
0, 1, 2, 3, 3, 3, 3, 3, 3, ...
-1, 1, 3, 4, 5, 5, 5, 5, 5, ...
0, 1, 5, 7, 8, 9, 9, 9, 9, ...
0, 1, 6, 11, 13, 14, 15, 15, 15, ...
-1, 1, 10, 17, 22, 24, 25, 26, 26, ...
MATHEMATICA
nMax = 12; col[m_ /; 0 <= m <= nMax] := 1/(1 + ContinuedFractionK[-x^k (1 - x^(m + k)), 1, {k, 1, Ceiling[nMax/2]}]) + O[x]^(2 nMax) // CoefficientList[#, x]&; A = Table[col[m][[1 ;; nMax + 1]], {m, 0, nMax}] // Transpose; a[n_ /; 0 <= n <= nMax, m_ /; 0 <= m <= nMax] := With[{n1 = n + 1, m1 = m + 1}, A[[n1, m1]]]; Table[a[n - m, m], {n, 0, nMax}, {m, n, 0, -1}] // Flatten (* Jean-François Alcover, Nov 03 2016 *)
CROSSREFS
KEYWORD
sign,tabl
AUTHOR
Alois P. Heinz, Aug 29 2013
STATUS
approved