218025
domain: N
Appears in sequences
- Alkane (or paraffin) numbers l(8,n).at n=32A005995
- Odd doubly abundant numbers (A125639).at n=13A129087
- a(n) = n*(n+1)*(5*n^2 - n - 3)/2.at n=17A172118
- 0-sequence of reduction of (3n) by x^2 -> x+1.at n=18A192307
- Number of nonisomorphic graded posets with 0 and non-uniform Hasse graph of rank n, with no 3-element antichain.at n=10A206949
- Binomial(n-1,3)+3*binomial(n-1,4)+6*binomial(n-1,5)+5*binomial(n-1,6).at n=19A235593
- Convolution of nonzero hexagonal numbers (A000384) with themselves.at n=16A271870
- Number of n-element subsets of [n+5] having an even sum.at n=32A282081