21251

Appears in sequences

• Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite EUO = EU-1 Nan[AlnSi112-nO224] starting with a T6 atom.at n=13A019125
• a(n) = Sum_{k=1..n} C(n,k)^4 where C(n,k) is binomial(n,k).at n=4A096192
• a(n) = smallest M such that M is not divisible by prime(1), ..., prime(n), but is divisible by Sum_{i=1..n} (M mod prime(i)); or 0 if no such M exists.at n=20A106572
• a(n) = 625*n + 1.at n=33A158383
• a(n) = 34*n^2 + 1.at n=25A158586
• The fourth row of the ED3 array A167572.at n=6A167574
• Numbers m having the same sum of divisors as m+20 has.at n=35A181647
• Numbers that can be written in more than 1 way as p^2 + 3pq + q^2 with primes p < q.at n=12A218795
• Number of 0..n arrays of length 3 with each element differing from at least one neighbor by something other than 1.at n=27A221574
• Number of length 3 0..n arrays with each partial sum starting from the beginning no more than sqrt(3) standard deviations from its mean.at n=27A244942
• Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 459", based on the 5-celled von Neumann neighborhood.at n=36A288403
• Number of nX5 0..1 arrays with every element equal to 0, 2, 3, 5, 6 or 7 king-move adjacent elements, with upper left element zero.at n=6A299246
• Number of nX7 0..1 arrays with every element equal to 0, 2, 3, 5, 6 or 7 king-move adjacent elements, with upper left element zero.at n=4A299248
• T(n,k)=Number of nXk 0..1 arrays with every element equal to 0, 2, 3, 5, 6 or 7 king-move adjacent elements, with upper left element zero.at n=59A299249
• T(n,k)=Number of nXk 0..1 arrays with every element equal to 0, 2, 3, 5, 6 or 7 king-move adjacent elements, with upper left element zero.at n=61A299249
• MM-numbers of crossing set partitions.at n=24A324324
• Numbers that are the sum of six fourth powers in five or more ways.at n=7A345562
• Numbers that are the sum of six fourth powers in six or more ways.at n=0A345563
• Numbers that are the sum of six fourth powers in seven or more ways.at n=0A345564
• Numbers that are the sum of six fourth powers in exactly seven ways.at n=0A345819