286824

Appears in sequences

• Distinct even numbers in writing first numerator and then denominator of each element of the 1/4-Pascal triangle (by row).at n=25A046589
• Partial sums of A051877.at n=15A050403
• a(n) = binomial(n+6,6)*(2n+7)/7.at n=15A050486
• Convolution square of A058187, the tetrahedral series with repeats.at n=30A178440
• Number of ways to select 15 knights from n knights sitting at a round table if no adjacent knights are chosen.at n=7A188225
• a(n) = binomial(3*n,n)*(5*n+2)/(2*n+1).at n=7A249691
• Number of permutations p of [n] such that the sequence of ascents and descents of p is encoded by the 0's and 1's, respectively, in the binary expansion of n (read from right to left and using leading 0's if necessary).at n=22A335308
• a(n) = a(n-1) + a(n-3), with a(0) = 1, a(1) = 4, a(2) = 8.at n=30A385633