371931domain: NAppears in sequencesFibonacci sequence beginning 0, 21.at n=22A022355a(n) = n * Fibonacci(n+1).at n=21A023607Expansion of Sum_{1<=i<=j<=k} q^(i+j+k)/( (1-q^i)*(1-q^j)*(1-q^k) )^2.at n=27A374930