89401

Appears in sequences

• a(n) = (10*n + 9)^2.at n=29A017378
• a(n) = (11*n + 2)^2.at n=27A017414
• a(n) = (12*n + 11)^2.at n=24A017654
• Smallest extension of n-th prime which is a square.at n=23A030671
• Number of permutations (p1,...,pn) such that 1 <= |pk - k| <= 2 for all k.at n=20A033305
• a(n) = Product_{d|n} (n/d + d).at n=21A045661
• Squares with initial digit '8'.at n=23A045792
• Square elements of A046895.at n=5A046896
• a(n) = (n-1)!*a(n-1)+1.at n=6A051399
• Digital sum of n = sum of palindromes from the smallest prime factor of n to the largest prime factor of n.at n=31A074310
• Smallest square obtained by inserting one or more digits between every pair of consecutive digits of n^2.at n=28A080438
• Squares of the form semiprime(n) + prime(n).at n=31A111440
• a(n) = ((n+1)*(2*n-1))^2.at n=12A123198
• Squares that becomes primes when prefixed with a 3.at n=26A167718
• Number of nX4 binary arrays with no element equal to the mod 3 sum of its diagonal and antidiagonal neighbors.at n=10A183371
• Number of n X 2 array permutations with each element moving one space diagonally, horizontally or vertically.at n=9A189348
• Squares which are a decimal concatenation of triprimes.at n=13A225151
• Perfect squares of the form prime(k+1)^2 - prime(k)^2 + 1 where prime(k) is the k-th prime number.at n=36A289829
• Numbers k such that 28*10^k + 1 is prime.at n=23A293824
• Abelian orders m for which there exist at least 4 groups of order m.at n=33A350323