78840

Appears in sequences

• Base 9 digits are, in order, the first n terms of the periodic sequence with initial period 1,3,0.at n=5A037602
• Expansion of (1+3*x+9*x^2+12*x^3+11*x^4+3*x^5+x^6)/((1-x)^2*(1-x^2)^2*(1-x^3)).at n=26A055383
• a(n) = 4*n^3 + 4*n.at n=27A105374
• Triangle, T(n, k) = (1/2)*(n+2)! * [x^k]( p(x, n) ), where p(x,0) = 1, p(x,1) = -x, P(x, n) = (1/(n+1))*( (2*n-x)*P(x, n-1) - n*P(x, n-2) ), read by rows.at n=32A136532
• Number of 2 X n 0..3 arrays x(i,j) with each element horizontally, diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 4 and at least one element with value (x(i,j)-1) mod 4, no adjacent elements equal, and upper left element zero.at n=9A231050
• Number of length n sequences on alphabet {0,1,2} that contain all of 00, 01, 02, 10, 11, 12, 20, 21, 22 as (possibly overlapping) contiguous subsequences.at n=3A243862
• E.g.f. satisfies A(x)^A(x) = 1/(1 - x)^x.at n=10A356905
• Expansion of e.g.f. -log(1 + x^2/2 * log(1 - x)).at n=9A368165