272272

Appears in sequences

• a(n) is the number of Dyck paths of semilength n+6 having its first peak at height n+1.at n=25A005557
• Palindromes with exactly 8 prime factors (counted with multiplicity).at n=8A046334
• Composite palindromes divisible by the sum of their prime factors (counted with multiplicity).at n=16A046348
• Number of permutations of n letters where exactly 5 change position.at n=16A060836
• Final terms of rows of A077529.at n=33A077530
• Permutations with exactly 12 fixed points.at n=5A129255
• Denominator of the polynomial A_l(x) = sum_{d=1..l-1} x^(l-d)/d for index l=2n+1 evaluated at x=9.at n=8A145626
• Minimal covering numbers.at n=59A160559
• Number of standard Young tableaux of shape [5n,5].at n=6A215545
• a(n) = binomial(7*n,n)*(5*n+1)/(6*n+1).at n=5A215551
• Triangular array read by rows. T(n,k) is the number of functional digraphs on {1,2,...,n} such that no node is at a distance greater than one from a cycle and there are k recurrent elements whose preimage contains only one element, n>=0, 0<=k<=n.at n=37A220222
• Denominators of the sum of the reciprocals of the Collatz (3x+1) sequence beginning at n.at n=6A225784
• Denominators of the sum of the reciprocals of the Collatz (3x+1) sequence beginning at n.at n=13A225784
• Minimal possible denominator for a sum of the form 1 +/- 1/2 +/- 1/3 +/- ... +/- 1/n.at n=17A232090
• Denominator of n*Sum_{k=1..n} 1/(n+k).at n=8A296519
• Denominator of the sum of all elements of the n X n matrix M with M[i,j] = (-1)^(i+j)*i/j for i,j = 1..n.at n=16A334724
• Denominator of the sum of all elements of the n X n matrix M with M[i,j] = (-1)^(i+j)*i/j for i,j = 1..n.at n=17A334724
• Palindromes that are multiples of 11 and whose digit sum is also a multiple of 11.at n=32A346221
• Palindromes with exactly 5 distinct prime divisors.at n=36A373465