27411

Appears in sequences

• Records in A104883.at n=25A104884
• Sum of heights of all 2-watermelons with wall of length 2*n.at n=5A136440
• Number of n X 3 binary arrays with some element plus some horizontally, vertically, diagonally or antidiagonally adjacent neighbor totalling two exactly once.at n=7A268761
• T(n,k)=Number of nXk binary arrays with some element plus some horizontally, vertically, diagonally or antidiagonally adjacent neighbor totalling two exactly once.at n=47A268766
• Composite numbers k such that phi(x) = psi(k)*phi(k) has no solution.at n=24A292714
• Solution of the complementary equation a(n) = a(n-1) + 3*a(n-2) -2*a(n-3) - 2*a(n-4) + b(n-3), where a(0) = 1, a(1) = 2, a(2) = 3, a(3) = 4, b(0) = 5, b(1) = 6, b(2) = 7, b(3) = 8, and (a(n)) and (b(n)) are increasing complementary sequences.at n=17A295621
• Numbers k such that (38*10^k + 187)/9 is prime.at n=17A295631
• a(n) = (a(n-1) + a(n-3))/2^m, where 2^m is the highest power of 2 that divides both a(n-1) and a(n-3), with a(0) = a(1) = a(2) = 1.at n=48A341313