Where t(n) is the n-th Tribonacci number as defined by:
a(0)=1, a(1)=4, a(2)=4, a(n)=a(n-1)+a(n-2)+a(n-3)

t(112867)=2230464784 ... 1996909417
t(76895)=2391191483 ... 0807289471


Verified PRP by pfgw.

To be completed...