248710
domain: N
Appears in sequences
- Alkane (or paraffin) numbers l(12,n).at n=13A018213
- One half of binomial coefficients binomial(2*n-8,9).at n=6A053133
- Numbers k such that sigma(k) = 9*phi(k).at n=25A163667
- 0-sequence of reduction of (2n) by x^2 -> x+1.at n=19A192305
- Transpose of square array A277810.at n=40A277809
- Square array A(r,c) = A019565(A277820(r,c)), read by descending antidiagonals as A(1,1), A(1,2), A(2,1), A(1,3), A(2,2), A(3,1), etc.at n=40A277810
- Number of 9-element subsets of [n+9] having an even sum.at n=13A282077
- Number of n-element subsets of [n+9] having an even sum.at n=13A282085
- Indices of records in A353693.at n=25A353695
- Maximum over 0 <= k <= n/2 of the number of permutations of two symbols occurring k and n-2*k times, respectively, where a permutation and its reversal are counted only once.at n=31A362260
- Products of 6 distinct primes that are sandwiched between semiprime numbers.at n=31A378627