38320

Appears in sequences

• floor[2^n/Fibonacci(n)].at n=45A057861
• Pentagonal numbers (A000326) whose digit reversal is a prime.at n=24A115707
• Nonprimes in the triangle A141020.at n=30A141031
• Number of permutations of 1..n with all differences of elements separated by distances 1 through 3 being respectively unique.at n=11A170809
• Pentagonal numbers that are also Niven numbers.at n=41A242043
• Partial sums of A243980.at n=31A244050
• Numbers x such that sigma(x)=sigma(V(x)), where sigma(x) is the sum of the divisors of x and V(x) the transform defined in A245252.at n=12A245469
• Pentagonal numbers divisible by 4.at n=40A298397
• Larger of amicable pair m < n defined by t(n) = m and t(m) = n where t(n) = psi(n) - n and psi(n) = A001615(n) is the Dedekind psi function.at n=17A323330
• G.f. = Phi^5, where Phi = g.f. for A028930.at n=22A328530
• Sum of lengths of SB (shortest border) factorizations over all binary strings of length n.at n=13A330886
• Number of tilings of a 5 X n rectangle using n pentominoes of shapes T, W, Y, X.at n=19A366324