27477

Appears in sequences

• Numbers k such that 219*2^k+1 is prime.at n=40A032486
• Number of tandem duplication trees on n duplicated gene segments.at n=8A086521
• L-th order palindromes with L > 2.at n=24A089381
• Partial sums of A002522, starting at n=1.at n=42A145066
• Triangular array: For n >= 2 and 0 < k <= n - 2, T(n, k) equals the number of (unrooted) duplication trees on n gene segments that are canonical and whose leftmost visible duplication event is (k, r), for 1 <= r <= (n - k)/2.at n=52A264870
• Triangular array: For n >= 2 and 0 < k <= n - 2, T(n, k) equals the number of (unrooted) duplication trees on n gene segments that are canonical and whose leftmost visible duplication event is (k, r), for 1 <= r <= (n - k)/2.at n=53A264870
• Triangular array: For n >= 2 and 0 < k <= n - 2, T(n, k) equals the number of (unrooted) duplication trees on n gene segments that are canonical and whose leftmost visible duplication event is (k, r), for 1 <= r <= (n - k)/2.at n=54A264870
• Dirichlet convolution of the integer partition numbers A000041 with the strict partition numbers A000009.at n=38A323765
• Array read by antidiagonals: T(m,n) (m >= 0, n >= 0) = number of max-and-min-closed constraints between an m-element set and an n-element set.at n=59A372068
• Array read by antidiagonals: T(m,n) (m >= 0, n >= 0) = number of max-and-min-closed constraints between an m-element set and an n-element set.at n=61A372068