1046529

Appears in sequences

• a(n) = (2^n - 1)^2.at n=9A060867
• a(n) = (4*n^2 - 1)^2.at n=16A069075
• Numbers k having exactly one divisor d such that in binary representation d and k/d have the same number of 1's as k.at n=35A080026
• Resultant of the polynomial x^n-1 and the Chebyshev polynomial of the second kind U_2(x).at n=9A085435
• Expansion of (1 + 2*x^2)/((1 + x)*(1 - 2*x)*(1 - 2*x^2)).at n=19A085903
• a(n+1) is the smallest square > a(n) such that every concatenation (n > 1) is a prime.at n=14A087352
• Smallest square k == 1 (mod some n-th power), k > 1.at n=10A088037
• a(n) = ( n*(n+2) )^2.at n=31A099761
• Denominator of 1/n^2-1/(n+2)^2.at n=31A171522
• Squares k such that, if k has d digits, k has at least one digit in common with every other d-digit square.at n=40A173943
• Square numbers with at least one digit in common with any other positive square number.at n=19A182657
• Square numbers with at least one digit in common with any other square number.at n=3A182658
• Number of n X 4 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 0 1 1 vertically.at n=30A208114
• Number of 4 X n 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 1 and 0 1 1 vertically.at n=8A208556
• Hilltop maps: number of nX4 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal, vertical or antidiagonal neighbor in a random 0..3 nX4 array.at n=4A218368
• Hilltop maps: number of nX5 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal, vertical or antidiagonal neighbor in a random 0..3 nX5 array.at n=3A218369
• T(n,k)=Hilltop maps: number of nXk binary arrays indicating the locations of corresponding elements not exceeded by any horizontal, vertical or antidiagonal neighbor in a random 0..3 nXk array.at n=31A218372
• T(n,k)=Hilltop maps: number of nXk binary arrays indicating the locations of corresponding elements not exceeded by any horizontal, vertical or antidiagonal neighbor in a random 0..3 nXk array.at n=32A218372
• Squares which have one or more occurrences of exactly seven different digits.at n=1A235722
• Gaussian norm of 1+(1+i)^n.at n=20A238187