45925

Appears in sequences

• Numbers k such that sigma(k) = sigma(k+8).at n=35A015876
• Sum of squares of first n positive integers congruent to 1 mod 3.at n=24A024215
• a(0) = 0, a(1) = 1, and a(n) = ((2*n - 1)*a(n-1) + 3*n*a(n-2))/(n - 1) for n >= 2.at n=10A102839
• Triangle read by rows: T(n,k) is the number of paths in the first quadrant from (0,0) to (n,0), consisting of steps U=(1,1), D=(1,-1), h=(1,0) and H=(2,0), having k H steps (0<=k<=floor(n/2)).at n=51A132280
• a(n) is the smallest number, larger than the previous, such that the RMS (Root Mean Square) of a(0) through a(n) is an integer.at n=17A141393
• Product of Fibonacci and Motzkin numbers: a(n) = A000045(n+1)*A001006(n).at n=9A200539
• a(n) = Sum_{i=0..n} i*Fibonacci(i)^2.at n=10A282464
• a(n) = 7*3^n - 2.at n=8A355492
• a(n) = Sum_{k=0..floor(n/3)} binomial(n+k-1,k) * binomial(n+2*k-1,n-3*k).at n=10A389378