100352

Appears in sequences

• Number of spanning trees in P_4 X P_n.at n=3A003696
• Number of spanning trees in n X n grid.at n=3A007341
• Numbers whose prime factors are 2 and 7.at n=38A033847
• Greatest common divisor of n! and n^n.at n=13A051696
• 13-almost primes (generalization of semiprimes).at n=25A069274
• Triangular array T(n,k) read by rows, giving number of labeled free trees such that the root is smaller than all its children, with respect to the number n of vertices and to the label k of the root.at n=24A071211
• Smallest nontrivial (not = 10^(n-1)) n-digit 7-smooth number. Or smallest n-digit number > 10^(n-1) with prime divisors < 10.at n=5A085867
• Numbers k such that prime(k+1) == 5 (mod k).at n=15A105329
• Square array read by antidiagonals: T(m,n) = number of spanning trees in an m X n grid.at n=24A116469
• Delannoy paths counted by number of weak peaks.at n=41A133214
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, -1), (-1, 1, 1), (1, 0, 0), (1, 0, 1)}.at n=10A150029
• Let q(p) be the smallest prime greater than the prime p. A positive integer n is included in this sequence if n+1 is divisible by q(p) for each prime p dividing n.at n=33A163619
• Numbers k that divide A000201(k)^m for some integer m > 0, where A000201 is the lower Wythoff sequence.at n=34A185615
• Number of domino tilings of the n X n grid with upper left corner removed iff n is odd.at n=7A189002
• Number of domino tilings of the 7 X n grid with upper left corner removed iff n is odd.at n=7A189004
• Cancellation factor in reducing Sum_{k=0...n} n^k/k! to lowest terms.at n=13A214402
• Number of times the digit 8 appears in the first 10^n digits of Catalan's constant.at n=5A224817
• Numbers m such that, in the prime factorization of m, the product of the exponents equals the sum of prime factors and exponents.at n=20A231231
• Number of length n+3 0..2 arrays with no four elements in a row with pattern aabb (possibly a=b) and new values 0..2 introduced in 0..2 order.at n=9A242543
• Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 270", based on the 5-celled von Neumann neighborhood.at n=16A280465