246905

Appears in sequences

• Odd tetrahedral numbers: a(n) = (4*n+1)*(4*n+2)*(4*n+3)/6.at n=28A015219
• Squarefree tetrahedral numbers.at n=32A070755
• a(n) = binomial(3*n + 1,3).at n=37A228887
• a(n) = (5*n + 3)*(5*n + 4)*(5*n + 5)/6.at n=22A300522
• Number of 4-member subsets of [4*n] whose elements sum to a multiple of n.at n=29A318625
• Tetrahedral numbers that are not divisible by any smaller tetrahedral number except 1.at n=29A318701
• Tetrahedral (or triangular pyramidal) numbers which are products of four distinct primes.at n=14A353027
• Array read by downward antidiagonals: A(n,k) = A(n-1,k+1) + (k+1)*Sum_{j=0..k} A(n-1,j) with A(0,k) = k+1, n >= 0, k >= 0.at n=41A371567