79981

Appears in sequences

• Numbers in which all pairs of consecutive base-6 digits differ by 3.at n=30A033077
• Composite numbers whose prime factors contain no digits other than 1 and 6.at n=10A036306
• Let M = 2 X 2 matrix [ 1 2 / 5 4 ]; a(n) = (1,1) entry of M^n.at n=6A092164
• a(n) = n^2*(n^3-n+2)/2.at n=11A101377
• Triangle, read by rows, where row n forms a polynomial in y=3*k that generates diagonal n as k=0,1,2,... for n>=0; thus T(n,k) = Sum_{j=0..n-k} T(n-k,j)*(3*k)^j, with T(n,0)=T(n,n)=1.at n=30A113716
• Column 2 of triangle A113716, in which row n forms a polynomial in y=3*k that generates diagonal n as k=0,1,2,... for n>=0.at n=5A113718
• Numbers k such that 3*k is a partition number.at n=22A213365