56880

Appears in sequences

• E.g.f.: sech(log(x+1)-tanh(x))=1-3/4!*x^4+40/5!*x^5-250/6!*x^6+1008/7!*x^7...at n=9A013293
• McKay-Thompson series of class 8b for Monster.at n=19A058088
• a(n) = 18*(n - 2)*(2*n - 5).at n=40A060787
• The PDO(n) function (Partitions with Designated summands in which all parts are Odd): the sum of products of multiplicities of parts in all partitions of n into odd parts.at n=45A102186
• Expansion of (chi(q)^5 * chi(-q))^2 in powers of q where chi() is a Ramanujan theta function.at n=19A143894
• The list of the k values in the common solutions to the 2 equations 7*k+1 = A^2, 11*k+1 = B^2.at n=3A161585
• Numbers in A075728 which are not one less than some prime.at n=33A179232
• Number of (n+2)X(5+2) 0..1 arrays with each row divisible by 5 and column not divisible by 5, read as a binary number with top and left being the most significant bits.at n=1A262792
• T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with each row divisible by 5 and column not divisible by 5, read as a binary number with top and left being the most significant bits.at n=16A262795
• Number of (2+2)X(n+2) 0..1 arrays with each row divisible by 5 and column not divisible by 5, read as a binary number with top and left being the most significant bits.at n=4A262797
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 579", based on the 5-celled von Neumann neighborhood.at n=39A273028
• Square array A(n,k), n >= 0, k >= 0, read by antidiagonals, where column k is the expansion of e.g.f.: Product_{j>0} 1/(1-j^k*x^j)^(1/j).at n=42A294761
• Number of integer partitions of n whose multiplicities appear with distinct multiplicities.at n=49A325329