180118domain: NAppears in sequencesFirst number of height n in Recamán's sequence A005132.at n=23A064290Values of A005132(n) at which the ratio A005132(n)/n sets a new record.at n=14A064621a(n)/2^n is the expected length of the longest palindromic subsequence of a length-n binary string.at n=13A320910