132120576

Appears in sequences

• a(n) = n*(n+3)*2^(n-3).at n=20A001793
• Coefficients of Chebyshev polynomials: n*(2*n-3)*2^(2*n-5).at n=10A002698
• a(1) = 1; a(n) is the smallest multiple of a(n-1) not divisible by 10 which is greater than the digit reversal of a(n-1). In case R(a(n-1)) < a(n-1) then a(n) = 2*a(n-1).at n=21A076086
• Triangle read by rows: T(n,k) (0<=k<=n) is the number of labeled graphs having k blue nodes and n-k green ones and only nodes of different colors can be joined by an edge.at n=49A111636
• Triangle read by rows: T(n,k) (0<=k<=n) is the number of labeled graphs having k blue nodes and n-k green ones and only nodes of different colors can be joined by an edge.at n=50A111636
• First differences of Mersenne numbers A001348, divided by 4.at n=8A139240
• Number of permutations of 7 indistinguishable copies of 1..n arranged in a circle with exactly 1 local maximum.at n=7A159738
• Number of ascending runs in {1,...,4}^n.at n=12A229278