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User:Jaume Oliver Lafont/C((d+1)n+d,d)

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= 1/A086089 [1] Centered nonagonal numbers A060544


[2] Odd tetrahedral numbers A015219


[3] [4] [5] A151989


[6]


[7] ([8])

[9]


Even d

For even values of , a general expression in terms of alternating sign binomial coefficients and cotangent values follows from the identity


case D=1


(General expression for odd values of ?)

Notes on the digamma function

[10],6.3.7. in [11], 6.4.7. in [12]
[13] [14]

Trigonometric functions defined from

[15]


[16][17] [18] [19]


[20]

Sinc function

[21][22]