797160

Appears in sequences

• a(n) = (3^n - 3)/2.at n=12A029858
• a(n) = 3*(a(n-2) + 1), with a(0) = 1, a(1) = 3.at n=23A087503
• Numbers that can be expressed as the difference of the squares of primes in exactly eleven distinct ways.at n=24A092007
• Expansion of (1+3x)/((1-x^2)(1-3x^2)).at n=23A094025
• a(n) = (n^7 - n)/6.at n=9A108495
• a(n) = 6 * A015518(n).at n=12A120471
• a(0) = 1, a(1) = 3, a(n) = 3*a(n-1) + 3 for n > 1.at n=12A123109
• a(n) = 3*A132357(n).at n=11A135264
• Number of 6-step one or two space at a time rook's tours on an n X n board summed over all starting positions.at n=9A187291
• a(n) = phi(3^n-1), where phi is Euler's totient function (A000010).at n=12A295500
• a(n) = phi(3^n+1), where phi is Euler's totient function (A000010).at n=13A366579