20777

Appears in sequences

• Number of (3412,1234)-avoiding involutions in S_n.at n=31A085583
• a(n) = n*3^(n-1) + (3^n + 1)/2.at n=8A086972
• 0-additive sequence: a(n) is the smallest number larger than a(n-1) that is not the sum of any subset of earlier terms, starting with initial values {2, 5}.at n=18A244749
• Numerator of Integral_{x=0..1} Product_{k=1..n} (1-x^k) dx.at n=4A258229
• Rectangular array A read by upward antidiagonals in which the entry in row n and column k is defined by A(n,k) = 5 + 9*A005836(2^(k - 1)*(2 n - 1)), n,k >= 1.at n=33A265159
• Number of nXn 0..1 arrays with every element unequal to 0, 2, 3, 5, 7 or 8 king-move adjacent elements, with upper left element zero.at n=6A316616
• Number of nX7 0..1 arrays with every element unequal to 0, 2, 3, 5, 7 or 8 king-move adjacent elements, with upper left element zero.at n=6A316619
• Number of integer partitions of n with a unique non-co-mode.at n=47A363129
• Numbers m such that Stern polynomial B(m,x) has no irreducible polynomial factors that themselves are Stern polynomials. The initial a(1) = 1 is included by convention.at n=28A389918