1138500

Appears in sequences

• a(n) = binomial(n+6,6)*(2n+7)/7.at n=19A050486
• Convolution square of A058187, the tetrahedral series with repeats.at n=38A178440
• a(n) = n*(n+1)*(n+2)*(n+3)*(2*n+1)/12.at n=22A356251