22716

Appears in sequences

• Expansion of 1/((1+x)*(1-x)^7).at n=14A001769
• a(n) = (n+1)*(n^2+n+2)/2; g.f.: (1 + 2*x^2) / (1 - x)^4.at n=35A006000
• 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 T5 atom.at n=13A019124
• Let (u1,u2) be successive untouchable numbers such that phi(u1) = phi(u2); sequence gives values of u1.at n=41A048189
• Diagonal sums of binomial-Möbius product.at n=14A101510
• Triangle read by rows: T(n,k) is the number of deco polyominoes of height n and having k columns ending at an odd level (0<=k<=n). A deco polyomino is a directed column-convex polyomino in which the height, measured along the diagonal, is attained only in the last column.at n=55A121697
• Number of deco polyominoes of height n in which all columns end at an even level. A deco polyomino is a directed column-convex polyomino in which the height, measured along the diagonal, is attained only in the last column.at n=9A121751
• Number of partitions of n containing a clique of size 2.at n=38A183559
• The sum over all bitstrings b of length n with at least two runs of the number of runs in b not immediately followed by a longer run.at n=11A208903
• Number of compositions of n where the difference between largest and smallest parts equals 5 and adjacent parts are unequal.at n=16A214274
• Number of n X 6 0..1 arrays with rows unimodal and columns nondecreasing.at n=6A225008
• Number of 7Xn 0..1 arrays with rows unimodal and columns nondecreasing.at n=5A225014
• Number of c-squarefree numbers (A233564) less than 2^n.at n=24A229898
• Number of permutations of [n] such that for each cycle c the smallest integer interval containing all elements of c has at most four elements.at n=11A276838
• Least number of tosses of a fair coin needed to have an even chance or better of getting a run of at least m consecutive heads or consecutive tails.at n=14A277828
• 38-gonal numbers: a(n) = n*(18*n-17).at n=36A282850
• Number of n X 3 0..1 arrays with every element unequal to 0, 1 or 5 king-move adjacent elements, with upper left element zero.at n=18A303714
• Positive integers that have exactly ten representations of the form 1 + p1 * (1 + p2* ... * (1 + p_j)...), where [p1, ..., p_j] is a (possibly empty) list of distinct primes.at n=23A317400
• Times on the display of a 24-hour digital clock with 6 digits, rounded to full seconds, at which the hour and minute hands of an analog clock form a right angle. Terms with fewer than 6 digits are to be assumed filled with zeros to the left.at n=4A347039