20535

Appears in sequences

• a(n) = 15*n^2.at n=37A064761
• Starting positions of strings of three 5's in the decimal expansion of Pi.at n=17A083620
• Triangle read by rows: T(n,k) is the number of ordered trees with n edges and having k branches of even length (n>=0, 0<=k<=floor(n/2)).at n=38A102004
• Floor(1/{(7+n^4)^(1/4)}), where {}=fractional part.at n=32A184631
• Number of (5+2) X (n+2) 0..3 arrays with every consecutive three elements in every row and diagonal having exactly two distinct values, and in every column and antidiagonal not having exactly two distinct values, and new values 0 upwards introduced in row major order.at n=27A252724
• Numbers k such that k!4 + 2^2 is prime, where k!4 = k!!!! is the quadruple factorial number (A007662).at n=37A291122
• Heinz numbers of integer partitions whose reciprocal sum is 1.at n=15A316855
• Heinz numbers of aperiodic integer partitions into relatively prime parts whose reciprocal sum is 1.at n=7A316888
• Heinz numbers of aperiodic integer partitions whose reciprocal sum is 1.at n=11A316889
• Heinz numbers of integer partitions into relatively prime parts whose reciprocal sum is 1.at n=7A316890
• Heinz numbers of integer partitions into relatively prime parts whose reciprocal sum is the reciprocal of an integer.at n=12A316901
• Number T(n,k) of colored integer partitions of n using all colors of a k-set such that each block of part i with multiplicity j has a pattern of i*j colors in (weakly) increasing order; triangle T(n,k), n>=0, 0<=k<=n, read by rows.at n=42A326500
• a(n) is the smallest nonnegative integer m such that the integer part of tan(m) is equal to n.at n=49A327788
• Composite numbers k such that D(k) == 3 (mod k), where D(k) is the k-th central Delannoy number (A001850).at n=8A330203
• Main diagonal of A332372.at n=12A332373
• a(n) is the number of edges formed by n-secting the angles of a pentagon.at n=40A335555
• Numbers k such that sigma(k) = psi(k) + 2 * tau(k).at n=33A387962