135306domain: NAppears in sequencesPositive numbers k such that k and 2*k are anagrams in base 7 (written in base 7).at n=25A023068Solution of the complementary equation a(n) = a(n-1) + a(n-2) + b(n-1) - b(n-2) + 1, where a(0) = 1, a(1) = 3, b(0) = 2, b(1) = 4.at n=22A294422