40410

Appears in sequences

• Number of numbers == 0 (mod 3) in range 2^n to 2^(n+1) with odd number of 1's in binary expansion.at n=17A000773
• Generalized Poly-Bernoulli numbers.at n=8A081674
• Expansion of (1-x)^4/((1-x)^6 - x^6).at n=17A119336
• Number of super unitary amicable pairs (i,j) with i<j and i<=10^n.at n=9A126163
• Smallest sequence which lists the position of digits "3" in the sequence.at n=36A167453
• Expansion of 1/((1-x)^6 - x^6).at n=13A192080
• The number of set partitions of {1,2,...,n} into exactly two subsets A,B such that the greatest common divisor of |A| and |B| = 1.at n=16A194924
• Values of the difference d for 6 primes in geometric-arithmetic progression with the minimal sequence {7*7^j + j*d}, j = 0 to 5.at n=19A209205
• p-INVERT of (1,1,1,1,1,...), where p(S) = 1 - S^6.at n=18A290993
• Numbers k such that Bernoulli number B_{k} has denominator 272118.at n=4A295594
• Total volume of all rectangular prisms with dimensions p, q and (p + q)/2 such that p and q are squarefree, n = p + q and p <= q.at n=35A303222
• a(n) = 1*2*3*4*5*6*7*8 + 9*10*11*12*13*14*15*16 + 17*18*19*20*21*22*23*24 + ... + (up to n).at n=9A319209
• Number of non-normal (0,1) semi-magic squares with sum of entries equal to n.at n=8A321720
• a(n) = n! * [x^n] Product_{k=1..n, gcd(n,k) = 1} (1 + x^k/k!).at n=18A338438
• Similar to A100787, but alternate with addition and multiplication instead. See Comments section for more information.at n=22A339951
• For the numbers k that can be expressed as k = w+x = y*z with w*x = (y+z)^2 where w, x, y, and z are all positive integers, this sequence gives the corresponding values of y+z.at n=45A343860