20958

Appears in sequences

• a(0) = 1, a(n) = 31*n^2 + 2 for n>0.at n=26A010020
• Number of labeled strongly connected n-state 2-input automata.at n=3A027834
• Sum of n-th antidiagonal of array in A082002.at n=27A082005
• The number of permutations p of {1,...,n} such that |p(i)-p(i+1)| is in {2,3} for all i from 1 to n-1.at n=23A174703
• Half the number of (n+1)X(n+1) 0..3 arrays with every 2X2 subblock diagonal sum differing from its antidiagonal sum by more than 3.at n=2A184222
• Half the number of (n+1)X4 0..3 arrays with every 2X2 subblock diagonal sum differing from its antidiagonal sum by more than 3.at n=2A184225
• T(n,k)=Half the number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock diagonal sum differing from its antidiagonal sum by more than 3.at n=12A184231
• Expansion of (1+5x+sqrt(1+2x+9x^2))/(2(1+2x)).at n=14A186195
• Triangle of coefficients of polynomials v(n,x) jointly generated with A208919; see the Formula section.at n=50A208920
• Number of partitions of n containing at least one prime.at n=37A235945
• Triangle read by rows: T(n,k) is the coefficient of (1+x)^k in the ZZ polynomial of the hexagonal graphene flake O(3,3,n).at n=51A338217
• Number of partitions of prime(n) containing at least one prime.at n=11A343813
• Number of integer partitions of n with more than one part of least multiplicity.at n=38A362609
• First differences of cubefree taxi-cab numbers.at n=7A387253