108864

Appears in sequences

• Triangle of coefficients in expansion of (2+3x)^n.at n=41A013620
• Numbers k that divide the (right) concatenation of all numbers <= k written in base 9 (most significant digit on left).at n=30A029454
• Triangle whose (i,j)-th entry is binomial(i,j)*3^(i-j)*2^j.at n=39A038220
• Number of labeled groups with a fixed identity.at n=9A058163
• Iteration of unitary-sigma function: a(1) = 2, a(n) = usigma(a(n-1)).at n=26A059460
• Digital sum of n = sum of palindromes from the smallest prime factor of n to the largest prime factor of n.at n=34A074310
• a(n) = a(n-1) + a(n-2) + R(a(n-3)) where a(0) = a(1) = a(2) = 1 and R(n) (A004086) means the reverse of n.at n=18A074858
• Triangle read by rows: T(n,k)=binomial(n,k-1)*k^(k-1)*(n+1-k)^(n-k) (1<=k<=n).at n=22A103690
• Sum of the non-unitary divisors of A064115(n) (or of 1+A064115(n)).at n=8A103846
• Areas, in ascending order, of integer-sided right triangles whose hypotenuses are squares.at n=18A141502
• Denominators of rational coefficients in series expansion of 1/(Bernoulli trial entropy).at n=49A145177
• 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, 0, 0), (-1, 1, 1), (1, 0, 0), (1, 0, 1)}.at n=9A150667
• Triangle T(n,m,p,q) = (p^(n-k)*q^k + p^k*q^(n-k))*(StirlingS2(n, k) + StirlingS2(n, n-k)) with p=2 and q=1, read by rows.at n=40A154915
• The sequence is a factorization of a designed multi-bifurcative triangle sequence: t(n,m)=A155582(n,m); f(n, m) = If[m <= Floor[n/2], f(m, 1)*f(n - m, 1)*t(n, m)].at n=19A155583
• The sequence is a factorization of a designed multi-bifurcative triangle sequence: t(n,m)=A155582(n,m); f(n, m) = If[m <= Floor[n/2], f(m, 1)*f(n - m, 1)*t(n, m)].at n=20A155583
• Triangular array read by rows. T(n,k) is the number of partial functions on n labeled objects in which the domain of definition contains exactly k elements such that for all i in {1,2,3,...}, (f^i)(x) is defined.at n=30A185390
• Triangular array: the fusion of polynomial sequences P and Q given by p(n,x)=(2x+3)^n and q(n,x)=1+x^n.at n=48A193796
• Mirror of the triangle A193798.at n=49A193799
• Area A of the triangles such that A, the sides and one of the altitudes are four consecutive integers of an arithmetic progression d.at n=35A210645
• Numbers having factorization Product_{i=1..m} p(i)^e(i) such that m > 1 and p(i) + e(i) is the same for each i.at n=27A219302