40626

Appears in sequences

• Numbers k such that 111*2^k-1 is prime.at n=44A050581
• a(n)=6*a(n-1)+25*a(n-2), n>2 ; a(0)=1, a(1)=1, a(2)=6 .at n=6A155458
• G.f.: Sum_{n>=0} a(n)*x^n/(1+x)^(n^2) = 1+x.at n=7A177447
• Number of (n+1)X6 0..2 arrays with every 2X2 subblock commuting with each of its horizontal and vertical 2X2 subblock neighbors.at n=6A186468
• Number of (n+1)X8 0..2 arrays with every 2X2 subblock commuting with each of its horizontal and vertical 2X2 subblock neighbors.at n=4A186470
• T(n,m)=Number of (n+1)X6 0..m arrays with every 2X2 subblock commuting with each of its horizontal and vertical 2X2 subblock neighbors.at n=34A188837
• Unsigned matrix inverse of triangle A214398, as a triangle read by rows n >= 1.at n=21A215241
• Number of (n+2) X (2+2) 0..3 arrays with every consecutive three elements in every row and diagonal having exactly two distinct values, and in every column and antidiagonal not having exactly two distinct values, and new values 0 upwards introduced in row major order.at n=19A252713
• Number of (n+1)X(4+1) arrays of permutations of 0..n*5+4 with each element having index change +-(.,.) 0,0 1,0 or 1,2.at n=2A264268
• T(n,k)=Number of (n+1)X(k+1) arrays of permutations of 0..(n+1)*(k+1)-1 with each element having index change +-(.,.) 0,0 1,0 or 1,2.at n=17A264272
• Number of (3+1)X(n+1) arrays of permutations of 0..n*4+3 with each element having index change +-(.,.) 0,0 1,0 or 1,2.at n=3A264274
• a(n) = Sum_{k = n..2*n+1} k^2.at n=25A299646