1979711488

Appears in sequences

• a(n) is the number of occurrences of 11s in the palindromic compositions of m=2*n-1 = the number of occurrences of 12s in the palindromic compositions of m=2*n.at n=25A079863
• a(n) = -2*a(n-1) + 4*a(n-3), with a(0) = 1, a(1) = a(2) = 0.at n=35A099212
• Total number of ones in runs of 1s of length <=2 over all binary strings of length n.at n=28A386270