611522domain: NAppears in sequencesa(n) = 28a(n-1) - a(n-2), starting with a(0) = 2 and a(1) = 28.at n=4A090249a(n) = n^4 + 8*n^3 + 20*n^2 + 16*n + 2.at n=26A304725Number of compositions of n with all adjacent parts (x, y) satisfying x < 2y and y <= 2x.at n=36A342338