218812domain: NAppears in sequencesLast term of n-th row of A077526.at n=20A077525a(1)=88; for n>=1, a(n+1) is the smallest palindromic 4-almost prime with a(n) as a central substring.at n=2A248047Palindromes that are multiples of 11 and whose digit sum is also a multiple of 11.at n=26A346221