31296

Appears in sequences

• Sum of terms in n-th row of A077164.at n=31A077167
• Smallest number that yields a prime when concatenated with A088265(k) for all k <= n.at n=5A088266
• Indices of primes in sequence defined by A(0) = 43, A(n) = 10*A(n-1) - 17 for n > 0.at n=18A101716
• Number of walks within N^2 (the first quadrant of Z^2) starting at (0,0) and consisting of n steps taken from {(-1, 0), (1, 0), (1, 1)}.at n=10A151281
• Molecular topological indices of the sunlet graphs.at n=23A192846
• Number of distinct lines passing through at least three points in a triangular grid of side n.at n=38A234248
• Number of length 1+2 0..n arrays with no three consecutive terms having the sum of any two elements equal to twice the third.at n=30A248462
• Number of (n+2)X(3+2) 0..3 arrays with every 3X3 subblock row and column sum not 2 4 5 or 7 and every diagonal and antidiagonal sum 2 4 5 or 7.at n=5A251871
• Number of (n+2)X(6+2) 0..3 arrays with every 3X3 subblock row and column sum not 2 4 5 or 7 and every diagonal and antidiagonal sum 2 4 5 or 7.at n=2A251874
• T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with every 3X3 subblock row and column sum not 2 4 5 or 7 and every diagonal and antidiagonal sum 2 4 5 or 7.at n=30A251876
• T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with every 3X3 subblock row and column sum not 2 4 5 or 7 and every diagonal and antidiagonal sum 2 4 5 or 7.at n=33A251876
• Number of n X n 0..3 arrays with some element plus some horizontally or vertically adjacent neighbor totalling three exactly once.at n=2A269090
• Number of n X 3 0..3 arrays with some element plus some horizontally or vertically adjacent neighbor totalling three exactly once.at n=2A269092
• T(n,k)=Number of nXk 0..3 arrays with some element plus some horizontally or vertically adjacent neighbor totalling three exactly once.at n=12A269097
• a(n) = 2*F(n-1) + 9*F(n-4) + 9*F(n-7) where n >= 7 and F = A000045.at n=14A280931
• a(n) = [x^n] Product_{k>=1} (1 + n*x^k)^k.at n=8A298987
• Number of subsets of {1...n} containing no prime indices of the elements.at n=20A324741