114240

Appears in sequences

• Expansion of 1/(1-x^3-x^4-x^5-x^6-x^7).at n=38A017820
• Expansion of e.g.f.: x^2*log(1-x)^4.at n=8A052790
• Smallest k such that d(phi(k)) - phi(d(k)) = -n, where d(k) = A000005(k) and phi(k) = A000010(k).at n=19A078151
• Product of the anti-divisors of n.at n=39A091507
• Number of ways to change three non-identical letters in the word aabbccdd..., where there are n types of letters.at n=34A102860
• a(n) = Sum_{m=1..n-1} floor(m(n-2)/2)^2.at n=18A125849
• Sequence A001333 with last digits set to zero.at n=14A131037
• Areas, in ascending order, of integer-sided right triangles whose hypotenuses are squares.at n=19A141502
• a(n) = the product of all distinct positive (nonzero) integers that, when written in binary, occur as substrings in the binary representation of n.at n=34A165153
• Exponential Riordan array (1, x*cosh(x)).at n=48A185951
• Exceptional values of n arising in search for solutions to x^4 - n*y^4 = 1.at n=3A213097
• Number of integers k^4 that divide 1!*2!*3!*...*n!.at n=17A248822
• Number of integers k^5 that divide 1!*2!*3!*...*n!.at n=19A248823
• Consider numbers n = concat(w,x,y,z) such that w*x*y*z | n. Leading zeros in x, y and z allowed. Sequence lists numbers that admit at least two such concatenations.at n=19A257172
• Solutions y to the negative Pell equation y^2 = 72*x^2 - 1331712 with x,y >= 0.at n=9A281242
• Number of ways to select 2 disjoint point triples from an n X n X n triangular point grid, each point triple forming an 2 X 2 X 2 triangle.at n=21A289223
• Triangle read by rows: T(n,k) is the number of permutations pi of [n] with k+1 valleys such that s(pi) avoids the patterns 132, 231, 312, and 321, where s denotes West's stack-sorting map (0 <= k <= floor((n-1)/2)).at n=39A319252
• a(n) = A349745(n) divided by 2 if it is even, and 0 if A349745(n) is odd.at n=6A351548
• Coefficients T(n,k) of x^n*y^k in A(x,y) for n >= 0, k = 0..3*n+1, where A(x,y) satisfies: y = Sum_{n=-oo..+oo} (-x)^(n^2) * A(x,y)^((n-1)^2), as an irregular triangle read by rows.at n=91A356500
• Coefficients T(n,k) of x^(4*n+1-k)*y^k in A(x,y) for n >= 0, k = 0..3*n+1, where A(x,y) satisfies: y = Sum_{n=-oo..+oo} (-x)^(n^2) * A(x,y)^((n-1)^2), as an irregular triangle read by rows.at n=54A356501