2042041

Appears in sequences

• Squares of primes, with property that all even digits occur together and all odd digits occur together.at n=20A030481
• Smallest square of the form [n digits][same n digits][further digits].at n=3A061051
• Member r=13 of the family of Chebyshev sequences S_r(n) defined in A092184.at n=7A098298
• Number of 2 X n 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 1 and 1 0 1 vertically.at n=20A207025