24042

Appears in sequences

• Palindromic even lucky numbers.at n=33A045960
• Palindromic untouchable numbers.at n=34A048187
• Numbers n for which there are exactly ten k such that n = k + reverse(k).at n=22A072434
• Palindromic even numbers with an odd number of distinct prime factors.at n=28A075809
• Palindromic even numbers with exactly 3 prime factors (counted with multiplicity).at n=33A075816
• a(n) = A078275(n)/11.at n=2A078276
• Palindromes k such that 3k + 1 is also a palindrome.at n=21A083829
• Palindromes n such that 4n + 1 is also a palindrome.at n=19A083831
• Palindromic admirable numbers.at n=10A109759
• a(n) = Sum_{m=1..n} Sum_{k=1..m} C(2*k,k), where C(2*k,k) = (2*k)!/(k!)^2 = A000984(k).at n=7A120278
• G.f. A(x) satisfies: A(x+x^2) = A(x)^2/(1+x)^2.at n=8A122939
• Palindromic cyclops numbers.at n=22A138131
• Numbers k such that |2^k-993| is prime.at n=23A165779
• Rectangular array: (row n) = b**c, where b(h) = h, c(h) = binomial(2*n-4+2*h,n-2+h), n>=1, h>=1, and ** = convolution.at n=37A213853
• Sixth derivative of f_n at x=1, where f_n is the n-th of all functions that are representable as x^x^...^x with m>=1 x's and parentheses inserted in all possible ways.at n=21A215836
• Triangle T(n,k) in which n-th row lists the values of the n-th derivative at x=1 of all functions that are representable as x^x^...^x with n x's and parentheses inserted in all possible ways; n>=1, 1<=k<=A000081(n).at n=21A216349
• Triangle T(n,k) in which n-th row lists in increasing order the values of the n-th derivative at x=1 of all functions that are representable as x^x^...^x with n x's and parentheses inserted in all possible ways; n>=1, 1<=k<=A000081(n).at n=30A216350
• Triangle T(n,k), n>=1, 0 <= k <= A002620(n-1), read by rows, where T(n,k) is the number of self-avoiding paths of length 2*(n+k) along the edges of a grid with n X n square cells, which do not pass above the diagonal, start at the lower left corner and finish at the upper right corner.at n=26A340043