130130

Appears in sequences

• Positive numbers k such that k and 2*k are anagrams in base 5 (written in base 5).at n=21A023061
• a(n) = 10*(n+1)*binomial(n+3,5)/3.at n=10A027790
• a(n) = 22*(n+1)*binomial(n+3,12).at n=3A027797
• Decimal expansion of a(n) is given by the first n terms of the periodic sequence with initial period 1,3,0.at n=5A037603
• a(n) = (n+1)(n+2)^2*(n+3)^2*(n+4)(2n+5)/720.at n=10A114242
• n! in base 5.at n=7A127109
• Dimensions of certain Lie algebra (see reference for precise definition).at n=5A133350
• The number of different 4-colorings for the vertices of all triangulated planar polygons on a base with n vertices if the colors of two adjacent boundary vertices are fixed.at n=10A174395
• T(n, k) = Sum_{j=0..k} (-1)^j*binomial(2*k, j)*(k - j)^(2*n)/(k!)^2, triangle read by rows, n >= 0 and 0 <= k <= n.at n=31A304336