24134domain: NAppears in sequencesNumber of strings of numbers x(i=1..7) in 0..n with sum i*x(i)^3 equal to 7*n^3.at n=19A184724Self-inverse permutation of natural numbers: a(0) = 0, a(1) = 1, and for n > 1, if A117966(n) < 0, a(n) = A117967(1+a(-(A117966(n)))), otherwise a(n) = A117968(a(A117966(n)-1)).at n=56A246211