91625967616domain: NAppears in sequencesExpansion of 1/((1-2*x)*(1-8*x)).at n=12A016131a(n) = 10*a(n-2) - 16*a(n-4) for n>=4, with a(0)=a(1)=1, a(2)=6, a(3)=10.at n=25A083333Smallest tetrahedral number with exactly n divisors, or 0 if no such number exists.at n=51A279082