The On-Line Encyclopedia of Integer Sequences (OEIS)

A340432 revision #5

A340432

Square array T(n,k), n >= 0, k >= 0, read by antidiagonals, where T(n,k) = 4^(2*n*k) * Product_{1<=a<=n} Product_{1<=b<=k} (1 - sin(a*Pi/(2*n+1))^2 * cos(b*Pi/(2*k+1))^2).

1, 1, 1, 1, 13, 1, 1, 121, 181, 1, 1, 1093, 18281, 2521, 1, 1, 9841, 1690781, 2803921, 35113, 1, 1, 88573, 152963281, 2732887529, 430503601, 489061, 1, 1, 797161, 13755675781, 2555011015201, 4447515497881, 66102491401, 6811741, 1

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OFFSET

0,5

LINKS

Table of n, a(n) for n=0..35.

EXAMPLE

Square array begins:

1, 1, 1, 1, 1, ...

1, 13, 121, 1093, 9841, ...

1, 181, 18281, 1690781, 152963281, ...

1, 2521, 2803921, 2732887529, 2555011015201, ...

1, 35113, 430503601, 4447515497881, 43384923739812577, ...