User talk:G. C. Greubel

A263573

Thank you for making the connection to A008706 (which I have clue about).--Bill McEachen 02:51, 27 January 2016 (UTC)

A113122

In sequence A113122 you mention in section "PROG (PARI)" the signature "G. C. Greubel, May 18 2018". The year is wrong. Probably you meant 2017. Best regards, Alfred --Alfred Heiligenbrunner 20:45, 29 December 2017 (UTC)

== A038231 ==

I'm not sure where to go with this in terms of this website.
A038231
((1/4+(1/4)*sqrt(1-16*x))^n-(1/4-(1/4)*sqrt(1-16*x))^n)*2^n/sqrt(1-16*x)
n=5
binomial(i, j)*4^(i-j)
-6144*x^5+8960*x^4-3584*x^3+576*x^2-40*x+1
-(6, 1)*4^(6-1)*x^5+(7, 3)*4^(7-3)*x^4-(8, 5)*4^(8-5)*x^3 +(9, 7)*4^(9-7)*x^2-(10, 9)*4^(10-9)*x+ (11,11)

It probably also has a relationship with:
(1/2+(1/2)*sqrt(1-16*x))^n+(1/2-(1/2)*sqrt(1-16*x))^n
kind of like fibonacci and lucas numbers

I think it has some orthogonal properties like Hermite Polynomials but I haven't got to that part on the Professor Leonard videos yet.