44044

Appears in sequences

• Trajectory of 5 under map x->x + (x-with-digits-reversed).at n=11A033649
• Trajectory of 13 under map x->x + (x-with-digits-reversed).at n=8A033652
• Trajectory of 17 under map x->x + (x-with-digits-reversed).at n=7A033654
• Trajectory of 31 under map x->x + (x-with-digits-reversed).at n=8A033661
• Trajectory of 79 under map x->x + (x-with-digits-reversed).at n=6A033673
• Start with n; if palindrome, stop; otherwise add to itself with digits reversed; a(n) gives palindrome at which it stops, or -1 if no palindrome is ever reached.at n=79A033865
• Palindrome reached from A033866(n) by Reverse-then-add.at n=6A033867
• Numbers having four 4's in base 10.at n=8A043508
• Palindromes with exactly 6 prime factors (counted with multiplicity).at n=20A046332
• Number of nonempty subsets of {1,2,...,n} in which exactly 5/6 of the elements are <= n/2.at n=26A047170
• Number of nonempty subsets of {1,2,...,n} in which exactly 5/6 of the elements are <= (n-1)/2.at n=26A047181
• Number of nonempty subsets of {1,2,...,n} in which exactly 1/6 of the elements are <= (n+2)/3.at n=21A048080
• Number of nonempty subsets of {1,2,...,n} in which exactly 1/6 of the elements are <= (n+3)/3.at n=21A048091
• a(n) = n*(n+1)*(n+2)*(n^2+7*n+32)/120.at n=19A051747
• n sets a new record for the number of integers k such that k is not of the form m + reverse(m) for any m and n occurs in the 'Reverse and Add' trajectory of k (cf. A067284).at n=20A067287
• Triangle read by rows: T(n, k) = binomial(2*n+1, n-k)^2*(2*k+1)/(2*n+1).at n=24A067802
• a(n) = n^2 concatenated with reverse(n^2) divided by 11.at n=22A084009
• Palindromes in A085934.at n=42A085935
• Palindromes in which the sum of the internal digits = the sum of the external digits.at n=26A088285
• a(n) = (1 + 3^n - 2*3^(n/2))/4 if n is even, (1 + 3^n - 4*3^((n-1)/2))/4 if n odd.at n=10A107767