87025

Appears in sequences

• a(n) = (8*n + 7)^2.at n=36A017150
• a(n) = (10*n + 5)^2.at n=29A017330
• a(n) = (11*n + 9)^2.at n=26A017498
• a(n) = (12*n + 7)^2.at n=24A017606
• Composite numbers whose prime factors contain no digits other than 5 and 9.at n=16A036321
• Squares with initial digit '8'.at n=19A045792
• Squares which are the arithmetic mean of two consecutive primes.at n=35A069495
• Perfect powers pp(n) with perfect power index n.at n=25A075433
• Numbers n for which the absolute value of the abundance of both n and n^2 is a prime number.at n=21A125237
• a(n) = (14*n+1)^2.at n=21A134934
• Cyclops squares: squares (A000290) that are also cyclops numbers (A134808).at n=16A160711
• Number of nX6 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 0 and 0 1 1 vertically.at n=4A207906
• T(n,k)=Number of nXk 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 0 and 0 1 1 vertically.at n=49A207908
• Number of 5Xn 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 0 and 0 1 1 vertically.at n=5A207910
• Squares which are a decimal concatenation of triprimes.at n=12A225151
• Smallest square that remains a square when prefixed with n.at n=22A247885
• Perfect powers that are the average of two consecutive primes.at n=38A270696
• Squares s such that s + 2 and s - 2 are semiprime.at n=38A278022
• Powers (A001597) that are also cyclops numbers (A134808).at n=16A285845
• a(n) = (p1 + p2)/36 such that p1 >= 5 and p2 = p1 + 2 are twin primes and p1 + p2 is a k-th power with k > 1.at n=36A330978