32544

Appears in sequences

• Symmetries in unrooted (1,4) trees on 3n-1 vertices.at n=5A003614
• a(n) = n!*(1/C(n,0) - 1/C(n,1) - ... - 1/C(n,[ n/2 ])).at n=8A024421
• a(n) = 2^n - n^2 + 1.at n=15A030110
• a(n) in base 15 is a repdigit.at n=51A048339
• Numbers n such that 6*10^n-1 is prime.at n=24A056716
• a(1) = a(2) = a(3) = 1 and a(n) = 24*binomial(n+1, 5) + n*(n^2 - n + 6) for n > 3.at n=11A062027
• When expressed in base 3 and then interpreted in base 8, is a multiple of the original number.at n=49A062889
• Numbers k such that 3*10^k + 6*R_k - 5 is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=20A102974
• a(n) = 4*a(n-1) - 7*a(n-2) + 8*a(n-3) - 4*a(n-4) starting 0, 1, 4, 7.at n=16A215458
• a(n) = Sum_{i=0..n} digsum_6(i)^4, where digsum_6(i) = A053827(i).at n=30A231675
• Number of k in the range 2^n <= k < 2^(n+1) whose shortest addition chain does not have length n, n+1 or n+2.at n=15A372152