22210

Appears in sequences

• Squares written in base 4.at n=26A001739
• a(n) = 1*prime(n) + 2*prime(n-1) + ... + k*prime(n+1-k), where k=floor((n+1)/2) and prime(n) is the n-th prime.at n=39A023870
• a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = (natural numbers), t = (primes).at n=38A024867
• n written efficiently in natural numbers base, i.e., in form ...wxyz where n =1*z + 2*y + 3*x + 4*w + ... with z < 1, y < 2, x < 3, w < 4, ...at n=24A055992
• McKay-Thompson series of class 27b for the Monster group.at n=33A058601
• Number of general plane trees which are either empty (the case a(0)), or whose root degree is either 1 (i.e., the planted trees) or the two leftmost subtrees (of the root node) are identical.at n=11A073190
• Array of fix-count sequences for the table A073200.at n=79A073202
• Number of partitions of n into parts not less than the smallest prime factor of n.at n=56A097360
• Coefficient of x^2 in polynomial whose zeros are 5 consecutive primes starting with the n-th prime.at n=3A125270
• Expansion of x^2*(1 + 2*x - x^2) / ((1 + x)*(1 - x - 4*x^2 + 2*x^3)).at n=14A173650
• Number of partitions of 3n into parts >= 3.at n=19A182806
• Numbers of rank 11 in the poset of lunar numbers.at n=35A191753
• Number of nX3 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,2,1,0,3 for x=0,1,2,3,4.at n=5A197202
• Number of nX6 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,2,1,0,3 for x=0,1,2,3,4.at n=2A197205
• T(n,k)=Number of nXk 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 4,2,1,0,3 for x=0,1,2,3,4.at n=30A197207
• T(n,k)=Number of nXk 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 4,2,1,0,3 for x=0,1,2,3,4.at n=33A197207
• Number of (n+1)X(n+1) 0..1 arrays with each 2X2 subblock having clockwise pattern 0000 0011 or 0101.at n=8A259214
• Number of edges in a figure made up of a row of n adjacent congruent rectangles upon drawing diagonals of all possible rectangles.at n=15A331757
• Numbers that cannot be expressed as the sum of one or more numbers without any repeated digits.at n=11A342080
• Ternary numbers consisting of a run of 2's, then a run of 1's, then a run of 0's.at n=9A371053