[seqfan] Re: A086953

Kevin Ryde user42_kevin at yahoo.com.au
Fri Aug 4 10:55:11 CEST 2017

hpd at hpdale.org (Harvey P. Dale) writes:
> 1/6 (2^x+4 (1/2-(I Sqrt[3])/2)^x+4 (1/2+(I Sqrt[3])/2)^x)

Could also give the periodic part explicitly if desired.
Something like 1/3*(2^n + [2,-2,-4,-2,2,4]), letting [] mean
the respective value according as n==0to5 mod 6 (in absense
of knowing better notation for that :).

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