69531

Appears in sequences

• a(n) = (n+1)^2*(n+2)*(2*n+3)/6.at n=20A108678
• Pyramidal 47-gonal numbers.at n=20A130566
• A double product sequence based on a=2; f(n,a) = f(n-1,a) + a*f(n-2,a).at n=23A173917
• A double product sequence based on a=2; f(n,a) = f(n-1,a) + a*f(n-2,a).at n=25A173917
• a(n) = n*(16*n^2 - 21*n + 7)/2.at n=21A260260
• Positions of pandigital 10-digit numbers after the decimal point in the decimal expansion of Pi.at n=28A280183
• Number of ordered ways of writing n^2 as a sum of n squares > 1.at n=11A294071