24750

Appears in sequences

• Numbers k such that k and 3*k are anagrams.at n=11A023087
• n-th natural number m such that m and m+2 are both divisible by exactly n primes (counted with multiplicity).at n=6A180245
• Number of ways to place 2 non-attacking wazirs on an n X n toroidal board.at n=14A201236
• Number of (w,x,y,z) with all terms in {1,...,n} and w<average{x,y,z}.at n=15A212088
• Number of permutations of [n] having a shortest ascending run of length 6.at n=11A228673
• Number of nonnegative integers with property that their base 10/7 expansion has n digits.at n=23A245431
• G.f.: C(x,y)^2 - S(x,y)^2 = Sum_{n>=0} x^(2*n)*y/[Sum_{k=0..2*n+1} T(n,k)*y^k], where C(x,y) = Sum_{n>=0} x^(2*n) / Product_{k=1..2*n} (k + y) and S(x,y) = Sum_{n>=0} x^(2*n+1) / Product_{k=1..2*n+1} (k + y).at n=38A268647
• Half of the height of the right trapezoidal gnomon (of the derivative of Y=X^5).at n=9A281999
• a(n) = A059897(A260443(n), A260443(1+n)).at n=24A284577
• Numbers k such that 463*2^k+1 is prime.at n=18A323201
• Numbers that occur in range of A324580.at n=49A324541
• a(n) = n * A276086(n).at n=22A324580
• Least common multiple of n and A276086(n).at n=22A328584
• Nonzero coefficients of the polynomials (x + d/dx)^n x^2, in row-major order.at n=49A330209
• Irregular table read by rows: Take a nonagon with all diagonals drawn, as in A332421. Then T(n,k) = number of k-sided polygons in that figure for k >= 3.at n=28A332427
• Numbers k such that k divides sum of k-th twin prime pair.at n=35A335303
• Numbers m such that the largest digit in the decimal expansion of 1/m is 4.at n=18A351470