27684

Appears in sequences

• a(n) = T(n, 2*n-5), T given by A027926.at n=19A027928
• a(n) = T(n,n-5), array T as in A055801.at n=40A055805
• Number of n X n arrays of squares of integers summing to 5 with every element equal to at least one neighbor.at n=6A146124
• a(n) = 1458*n - 18.at n=18A157508
• Numbers k such that the reversal of sigma*(k) equals the sum of the reversals of the anti-divisors of k, where sigma*(k) is the sum of the anti-divisors of k.at n=17A203616
• Number of binary arrays indicating the locations of trailing edge maxima of a random length-n 0..3 array extended with zeros and convolved with 1,1,1.at n=21A222433
• Number of n X 2 0..3 arrays with some element plus some horizontally, diagonally, antidiagonally or vertically adjacent neighbor totalling three no more than once.at n=4A269188
• Number of nX5 0..3 arrays with some element plus some horizontally, diagonally, antidiagonally or vertically adjacent neighbor totalling three no more than once.at n=1A269191
• T(n,k)=Number of nXk 0..3 arrays with some element plus some horizontally, diagonally, antidiagonally or vertically adjacent neighbor totalling three no more than once.at n=16A269194
• T(n,k)=Number of nXk 0..3 arrays with some element plus some horizontally, diagonally, antidiagonally or vertically adjacent neighbor totalling three no more than once.at n=19A269194
• Numbers k such that Bernoulli number B_{k} has denominator 1919190.at n=18A295595
• Numbers k such that k and k+1 have the same sum of powerful divisors (A183097) and this sum is larger than 1.at n=7A349063