37848

Appears in sequences

• Number of times n occurs in A000195.at n=10A064780
• Column 2 of triangle A118032, where column 2 of the matrix square of A118032 forms a bisection of this sequence.at n=18A118035
• Column 2 of triangle A118040, which is the matrix square of triangle A118032; also equals a bisection of A118035, which is column 2 of A118032.at n=9A118043
• a(n) = Sum_{i=0..n} digsum_5(i)^4, where digsum_5(i) = A053824(i).at n=47A231671
• a(n) is the least integer k such that there are n values of i <= k for which gpf(i^2 + 1) = gpf(k^2 + 1), where gpf(x) is the greatest prime factor of x.at n=33A258840
• Number of nXnXn triangular 0..3 arrays with some element plus some adjacent element totalling 3 exactly once.at n=3A270252
• T(n,k)=Number of nXnXn triangular 0..k arrays with some element plus some adjacent element totalling k exactly once.at n=18A270256
• Number of 4X4X4 triangular 0..n arrays with some element plus some adjacent element totalling n exactly once.at n=2A270259
• Harary index of the n X n queen graph.at n=18A296196
• Triangle read by rows: T(n,m) (n >= m >= 1) = number of line segments formed by drawing the lines connecting any two of the 2*(m+n) perimeter points of an m X n grid of squares.at n=50A331454