35553domain: NAppears in sequencesa(n) = 10000*log(n) rounded to nearest integer.at n=34A004244Palindromes of the form 4n + 1 where n is also a palindrome. Palindromes arising in A083831.at n=9A083832G.f. 1/sum(k>=0, (-1)^k * x^(k*(k+1)/2)).at n=48A208061