56277

Appears in sequences

• a(n) = T(2n-1,n), where T is the array defined in A026082.at n=7A026088
• a(n) = n + (n+1)^2 + (n+2)^3.at n=36A027620
• Numbers n such that n divides the (right) concatenation of all numbers <= n written in base 21 (most significant digit on right).at n=26A029514
• a(n) = (2*n-1)*(2*n+1)^2.at n=18A102094
• Row l=4 of array in A133713.at n=12A133714
• a(n) = n*(n+2)^2.at n=37A152619
• Numbers k such that there are 10 digits in k^2 and for each factor f of 10 (1, 2, 5) the sum of digit groupings of size f is a square.at n=23A153748
• v(n+1)/v(n), where v=A203705.at n=2A203706
• Number of nX1 0..2 arrays with every row and column least squares fitting to a zero slope straight line, with a single point array taken as having zero slope.at n=12A223743
• a(n) = -1/3 * (u^n-1)*(v^n-1) with u = 1+sqrt(3), v = 1-sqrt(3).at n=11A305650
• a(n) is the number of integers that can be represented in a 7-segment display by using only n segments (version A010371).at n=23A350438