20453

Appears in sequences

• Numbers that are the sum of 8 nonzero 8th powers.at n=27A003386
• Number of partial mappings (or mapping patterns) from n points to themselves; number of partial endofunctions.at n=10A126285
• Number of binary strings of length n with no substrings equal to 0011 0101 or 0110.at n=17A164503
• Number of 0..n arrays x(0..3) of 4 elements with zero 3rd differences.at n=39A200155
• Number of (w,x,y) with all terms in {0,...,n} and x != max(|w-x|,|x-y|).at n=27A213496
• Number of nondecreasing arrays of n 1..n integers with the sum of their 4th powers equal to sum(i^4,i=1..n).at n=17A216642
• Numbers n where tau(n) and n-tau(n) are perfect squares, with tau(n) the number of divisors of n (A000005).at n=36A245197
• p-INVERT of (1,1,0,0,0,0,...), where p(S) = 1 - S - S^2 - S^3 - S^4.at n=10A291399
• MM-numbers of labeled simple hypergraphs with no singletons spanning an initial interval of positive integers.at n=26A320463
• MM-numbers of labeled multi-hypergraphs with no singletons spanning an initial interval of positive integers.at n=33A320464
• Number of separable partitions of n in which the number of distinct (repeatable) parts is 6.at n=44A325650
• MM-numbers of crossing, capturing multiset partitions (with empty parts allowed).at n=6A326259
• Semiprimes of the form k^2 + 4.at n=30A360741