29041

Appears in sequences

• a(n) = n^4/2 - n^3 + 3*n^2/2 - n + 1 = (n^2 + 1)*(n^2 - 2*n + 2)/2.at n=16A058919
• a(n) = 2*prime(n)^2 - prime(n+1)^2.at n=41A064051
• Downward vertical of triangular spiral in A051682.at n=40A081272
• (Prime(prime(n))^2+1)/2.at n=15A092773
• a(n) = 60*n^2 + 1.at n=22A158673
• Composite numbers whose sum of aliquot parts divides the sum of the aliquot parts of the numbers less than or equal to n and not relatively prime to n.at n=23A249109
• a(n) = 32*n^2 - 56*n + 25.at n=31A272129
• Composite numbers n such that 2^lpf(n) == 2 (mod n), where lpf(n) = A020639(n).at n=28A276733
• Like 4-white numbers but with blocks of 4 starting at left.at n=13A277397
• Numbers k such that the equation x^2 - k*y^4 = -1 has a solution for which |y| > 2.at n=19A356488
• Expansion of g.f. x*(21 + 123*x + 129*x^2 + 4*x^3 + 129*x^4 + 123*x^5 + 21*x^6)/((1 - x)^3*(1 + x + x^2 + x^3)^2).at n=41A377166