18124

Appears in sequences

• Coordination sequence for MgNi2, Position Mg1.at n=33A009936
• Larger members of g-reduced amicable pairs a < b such that sigma(a) = sigma(b) = a + b + gcd(a,b).at n=38A054572
• Numbers n such that 3*2^(n-1) - 1 is prime.at n=33A091997
• a(n) = 625*n - 1.at n=28A158374
• Partial sums of A139250.at n=46A160424
• Multiples of 23 whose digit reversal + 1 is also a multiple of 23.at n=29A166393
• Number of 4-step S, E, and NW-moving king's tours on an n X n board summed over all starting positions.at n=30A187509
• Triangle T(n,k) giving the number of terms of A219666 which have n digits (A084558) in their factorial base expansion and whose most significant digit (A099563) in that base is k.at n=38A230420
• Triangle A230420 transposed.at n=42A230421
• Numbers for which the cube of the sum of the digits is equal to the square of the product of their digits.at n=22A241846
• Number of (n+2) X (1+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3 X 3 subblock summing to 3 4 5 or 6.at n=2A251830
• Number of (n+2)X(3+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 3 4 5 or 6.at n=0A251832
• T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 3 4 5 or 6.at n=3A251836
• T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 3 4 5 or 6.at n=5A251836
• Number of length n+7 0..1 arrays with at most one downstep in every 7 consecutive neighbor pairs.at n=12A255991
• Numbers n such that Bernoulli number B_{n} has denominator 1410.at n=21A272369
• Numbers k such that (4*10^k - 19)/3 is prime.at n=20A289081
• Bijective base-9 representation of the sum of all numbers in bijective base-9 numeration with digit sum n.at n=4A332691
• Main diagonal of array in A358298.at n=22A358301