61965

Appears in sequences

• Triangle T(n,k) read by rows, arising in enumeration of catafusenes.at n=63A024462
• a(n) = Sum_{k=1..n+1} A027960(n+1, n+1+k).at n=13A027974
• Duplicate of A027974.at n=13A027983
• Odd numbers divisible by exactly 8 primes (counted with multiplicity).at n=18A046321
• Second binomial transform of C(n+2,2).at n=8A081892
• Inverse binomial transform of A014217.at n=17A142585
• Number of (n+1) X (3+1) 0..1 arrays with each row divisible by 3 and column not divisible by 3, read as a binary number with top and left being the most significant bits.at n=5A262415
• T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with each row divisible by 3 and column not divisible by 3, read as a binary number with top and left being the most significant bits.at n=33A262420
• Number of (6+1)X(n+1) 0..1 arrays with each row divisible by 3 and column not divisible by 3, read as a binary number with top and left being the most significant bits.at n=2A262425
• Trapezoidal matrix T(n,k) (n>=1, 1<=k<=n+2) read by rows, arising in enumeration of unbranched k-4-catafusenes.at n=54A323943
• Expansion of Sum_{k>=1} ((1 + k * x^k)^k - 1).at n=26A327238