132572

Appears in sequences

• a(n) = binomial(4n, n) - binomial(4n, n - 3).at n=6A026020
• Numbers k such that the k-th triangular number contains only digits {3,7,8}.at n=6A119201
• Numbers k such that the fractional part of (101/100)^k is greater than 1-(1/k).at n=10A153672
• Number of (n+1)X(2+1) 0..3 arrays with the maximum plus the upper median plus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.at n=2A237673
• Number of (n+1)X(3+1) 0..3 arrays with the maximum plus the upper median plus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.at n=1A237674
• T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the maximum plus the upper median plus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.at n=7A237677
• T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the maximum plus the upper median plus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.at n=8A237677
• a(n) = 2*F(n-1) + 9*F(n-4) + 9*F(n-7) where n >= 7 and F = A000045.at n=17A280931