26051

Appears in sequences

• A Chebyshev transform of A030191 associated to the knot 7_6.at n=8A099448
• Irregular array where row n is the positive integers which divide the sum of all previous rows. a(1,1)=1.at n=58A119763
• Constant term of the reduction by x^2 -> x+1 of the polynomial p(n,x) defined at Comments.at n=18A192969
• Number of 2 X 2 matrices with all elements in {0,1,...,n} and determinant >=n.at n=15A210366
• Indices of primes in A214831.at n=29A244930
• Number of nX7 0..1 arrays with exactly n+7-1 having value 1 and no three 1s forming an isosceles right triangle.at n=7A272964
• Number of triangular partitions of n of order 9.at n=8A276280
• Numbers k such that A340179(k) is a multiple of k.at n=13A341060
• Numbers that are the sum of seven fourth powers in seven or more ways.at n=25A345573
• Numbers that are the sum of seven fourth powers in exactly seven ways.at n=16A345829
• Integers in Ulam's spiral for which the numbers around them form a square whose four corners are all prime numbers.at n=17A383596
• a(n) is the number of binary strings of length n which contain exactly one run of 1s of even length.at n=16A384497
• Smallest semiprime p1*p2 such that p2 mod p1 = n and no prime is used more than once in the sequence.at n=20A386256