40800

Appears in sequences

• Row sums up to the main diagonal of the "postage stamp" array (n,m >= 0) defined in A007059.at n=13A039671
• a(n) is the number of sets of natural numbers [a,b,c,d,e] that can be produced with the numbers [0..n] such that the values of all the distinct parenthesized expressions of a-b-c-d-e are different.at n=9A054026
• Number of primitive (aperiodic) words of length n which contain exactly four different symbols.at n=7A056269
• Number of primitive (aperiodic) palindromes using exactly four different symbols.at n=15A056465
• Row sums of the table A047916.at n=7A064649
• Expansion of (1-x)^(-1)/(1+2*x^2-x^3).at n=29A077892
• Maximal determinant of an n X n matrix using the integers 1 to n^2.at n=3A085000
• Largest achievable determinant of a 4 X 4 matrix whose elements are the 16 consecutive integers n-15,...,n.at n=8A097696
• Numbers k such that k and k^2 use only the digits 0, 1, 4, 6 and 8.at n=53A136861
• Number of 2 X 2 nonsingular 0..n matrices with rows in increasing order.at n=15A183761
• Numbers with prime factorization pqr^2s^5.at n=15A190293
• Triangle read by rows: T(n,k) (n>=1, 0<=k<n) is the number of permutations of n things that require k stack-sorts.at n=42A262494
• Number of nonisomorphic proper colorings of partition star graph using five colors.at n=48A297569
• Place two n-gons with radii 1 and 2 concentrically, forming an annular area between them. Connect all the vertices with line segments that lie entirely within that area. Then a(n) is the number of edges in that figure.at n=27A337702
• Numbers m such that for some number k dividing n, m is formed by inserting a digit 0 between each pair of digits of k.at n=29A343552
• Aliquot-like sequence based on the largest aliquot divisor of the sum of divisors of n (A371418) that starts with 222.at n=33A371423