33750

Appears in sequences

• Triangle whose (n,k)-th entry is 15^(n-k)*binomial(n,k).at n=17A027467
• Third column of A027467.at n=3A027476
• Triangle read by rows, defined by T(n,k) = C(n,k)*S2(n,k), 0 <= k <= n, where C(n,k) are the binomial coefficients and S2(n,k) are the Stirling numbers of the second kind.at n=63A090683
• Triangle read by rows: T(n,k)=(-1)^k*(2n/(2n-k))5^(n-k)*binomial(2n-k,k) (0<=k<=n, n>=1).at n=22A104064
• Triangle read by rows: T(n,k) is the number of partitions of the set {1,2,...,n} having exactly k blocks that contain both odd and even entries (0<=k<=floor(n/2)).at n=33A124418
• Numbers that are primally tight, have 2 as first prime and strictly ascending powers.at n=38A133809
• Average of twin prime pairs with multiple and strictly distinct powers.at n=37A177426
• Areas A of the triangles such that A, the sides and the three altitudes are integers.at n=33A210643
• Number of nX3 arrays of occupancy after each element stays put or moves to some horizontal or antidiagonal neighbor, with every occupancy equal to zero or two.at n=7A221414
• T(n,k)=Number of nXk arrays of occupancy after each element stays put or moves to some horizontal or antidiagonal neighbor, with every occupancy equal to zero or two.at n=52A221419
• Largest number k such that phi(k) = A007374(n).at n=31A224532
• Integers, a, which are the solutions to the equation a^2 + b^3 = c^4, with integers a, b > 0, and indexed off of A242183.at n=33A242184
• a(n) = 10*n^3.at n=15A244729
• Self-inverse permutation of nonnegative integers, A075158-conjugate of blue code: a(n) = 1 + A075157(A193231(A075158(n-1))).at n=28A245454
• Numbers whose squares became cubes if some digit is prepended, inserted or appended.at n=27A248127
• Numbers n = concat(x,y) such that the product x*y | n. No leading zeros in y allowed.at n=37A255726
• Differences of the increasing arithmetic progression a^2+a, b^2+b, c^2+c, where b = 5*a+2, c = 7*a+3 and a >= 0.at n=37A260955
• Expansion of Product_{k>=1} 1/((1 - x^k)*(1 - x^(5*k))).at n=36A318028
• A variant of A322827.at n=49A322825
• Multiplicative with a(p^e) = A276086(p^e).at n=57A324283