32256

Appears in sequences

• a(n) is the concatenation of n and 8n.at n=31A009470
• Triangle of coefficients in expansion of (1+4x)^n.at n=49A013611
• Numbers j such that sigma(sigma(j)) = k*j for some k.at n=29A019278
• Let sigma_m (n) be result of applying sum-of-divisors function m times to n; call n (m,k)-perfect if sigma_m (n) = k*n; sequence gives the (2,10)-perfect numbers.at n=3A019287
• Expansion of (theta_3(z)*theta_3(2z)*theta_3(4z)+theta_2(z)*theta_2(2z)*theta_2(4z))^4.at n=34A028701
• Triangle whose (i,j)-th entry is binomial(i,j)*4^(i-j).at n=50A038231
• 6-fold convolution of A000302 (powers of 4); expansion of 1/(1-4*x)^6.at n=4A045543
• Unitary-sigma sigma multiply perfect numbers: numbers k such that A061765(k) = m*k for some integer m.at n=38A045795
• Order of group G_{1,n}.at n=6A051465
• Order of group H_{1,n}^{8}.at n=6A051527
• E.g.f.: x^3*exp(x)^2.at n=9A052771
• Numbers k such that Sum_{j} p_j = Sum_{j} e_j where Product_{j} p_j^(e_j) is the prime factorization of k.at n=31A054411
• Number of labeled pure 2-complexes on n nodes (0-simplexes) with 5 2-simplexes and 10 1-simplexes.at n=2A054557
• Invert transform of Pascal's triangle A007318.at n=50A055372
• Invert transform of Pascal's triangle A007318.at n=49A055372
• Numbers that are the products of distinct substrings (>1) of themselves and do not end in 0.at n=33A059470
• E.g.f.: exp(-(x^5/5))/(1-x).at n=8A060725
• 12-almost primes (generalization of semiprimes).at n=14A069273
• Expansion of 1/(1 - 2*x - 2*x^2 - 2*x^3).at n=10A077835
• Duplicate of A077835.at n=10A077935