62011

Properties

Appears in sequences

• a(n) = 6*a(n-1) + a(n-2) for n > 1, with a(0) = a(1) = 1.at n=7A015451
• Appending a digit to n^2 gives another perfect square.at n=21A031150
• Numerators of convergents to 3/(1 + sqrt(10)).at n=19A093611
• Primes whose digit reversal is a triangular number.at n=15A115705
• Triangular array read by rows: see Comments for definition.at n=26A121875
• Prime numbers that contain the string "2011" in their decimal expansion.at n=4A191421
• Primes of the form 9n^2 + 10.at n=13A201708
• Numbers m such that 10*m^2 + 6 is a square.at n=6A221874
• Number of pyramid polycubes of a given volume in dimension 3.at n=21A229914
• Denominators of continued fraction convergents to sqrt(10)/2 = sqrt(5/2) = A020797 + 1.at n=19A295334
• Primes p such that A001175(p) = (p-1)/9.at n=31A308794
• Primes p such that A001177(p) = (p-1)/9.at n=17A308802
• One of the two successive approximations up to 2^n for 2-adic integer sqrt(-3/5). This is the 3 (mod 4) case.at n=14A341601
• Prime numbersat n=6234