930072domain: NAppears in sequencesNumber of palindromic compositions of n with parts in {1,2,4,6,8,10,...}.at n=46A276055a(n) = a(n-1) + 2*a(n-2) - a(n-3), where a(0) = 2, a(1) = 4, a(2) = 7.at n=22A287381p-INVERT of (1,1,1,1,1,...), where p(S) = (1 - S^3)^2.at n=11A291015