22180

Appears in sequences

• a(n) = Sum_{k=0..n} (k+1) * Sum_{j=0..n} 2^j*binomial(n,j)*binomial(n-k,j).at n=6A035029
• Duplicate of A035029.at n=7A049607
• Multiplicity of irreducible character IRR2 of Monster simple group in n-th head character.at n=33A055771
• Convolution of A055854 with A011782.at n=7A055855
• Interprimes which are of the form s*prime, s=20.at n=23A075295
• Number of base 22 circular n-digit numbers with adjacent digits differing by 1 or less.at n=8A124715
• Partial sums of A002522, starting at n=1.at n=39A145066
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (-1, 0, 0), (0, -1, 1), (1, -1, -1), (1, 1, 0)}.at n=9A149136
• Number of arrangements of 4 nonzero numbers x(i) in -n..n with the sum of floor(x(i)/x(i+1)) equal to zero.at n=10A189500
• T(n,k)=Number of nXk arrays of occupancy after each element stays put or moves to some horizontal, diagonal or antidiagonal neighbor, with every occupancy equal to zero or two.at n=30A221728
• Number of 3Xn arrays of occupancy after each element stays put or moves to some horizontal, diagonal or antidiagonal neighbor, with every occupancy equal to zero or two.at n=5A221729
• Number of partitions of n such that the number of parts having multiplicity >1 is not a part and the number of distinct parts is a part.at n=48A241410
• Inverse permutation of A064364, when seen as flattened list.at n=60A257815
• Number of permutations of [n] with exactly eight (possibly overlapping) occurrences of the generalized pattern 23-1.at n=2A264467
• Triangle read by rows, T(n, k) = (-1)^(n-k)*binomial(n,k)*hypergeom([k - n, n + 1], k + 1, 2), for n >= 0 and 0 <= k <= n.at n=38A297898