23274

Appears in sequences

• Numbers k such that phi(k) + 2 | sigma(k + 2).at n=22A015781
• Numerators of continued fraction convergents to sqrt(323).at n=5A041610
• a(n) = ChebyshevT(3, n).at n=18A144129
• a(n) = (n+3)^2*n/2 + 1.at n=34A154560
• Central element of a series of 5 successive nonsquarefree numbers.at n=13A188296
• a(n) + a(n+2) = n^3.at n=36A206481
• a(n) = n^3 - a(n-2) for n >= 2 and a(0)=0, a(1)=1.at n=35A215097
• Number of length 7+2 0..n arrays with every three consecutive terms having the sum of some two elements equal to twice the third.at n=12A248440
• Chebyshev T-polynomials T_n(18).at n=3A322889
• a(n) is the number of regions formed by n-secting the angles of a nonagon (enneagon).at n=41A335781