99199

Appears in sequences

• Quasi-Carmichael numbers to base 9: squarefree composites n such that (n,2*3*5*7) = 1 and prime p|n ==> p-9|n-9.at n=13A029554
• Numbers having four 9's in base 10.at n=19A043528
• Palindromes n such that n and n^2 have same digit sum.at n=27A058852
• Largest palindrome using minimum number of digits with a digit sum = n.at n=37A070244
• Expansion of (1-x)/(1+2*x+2*x^2-x^3).at n=21A078068
• Numbers n which in decimal have the form imj, where m is the middle digit, with property that j is the reversal of i, and i = m*j.at n=17A082945
• Palindromes that cannot be expressed as the difference of two palindromes.at n=20A083142
• Terms of A083393 such that the sum of the factorials of the digits is prime.at n=23A083394
• Smallest palindromic multiple of (n with trailing 0's omitted, A004151) using only nonzero digits of n; all digits must appear; or 0 if no such number exists.at n=18A083960
• a(n) = 62*n^2 - 1.at n=39A158680
• Palindromic numbers which are sum of consecutive squares.at n=42A180436
• Palindromic numbers which can be written as the sum of two or more consecutive squares.at n=29A216446
• Smallest palindrome which requires at least n iterations of Reverse and Add to reach a palindrome.at n=21A222533
• Number of decompositions of highly composite numbers (A002182) into unordered sums of two primes.at n=46A228943
• a(n) = 10^(2*n+1) - 1 - 8*10^n.at n=2A332191