59983

Appears in sequences

• 5-dimensional pyramidal numbers: a(n) = n*(n+1)*(n+2)*(n+3)*(2n+3)/5!.at n=18A005585
• Odd numbers to the right of the central elements of the (1,2)-Pascal triangle A029635.at n=52A029650
• An interleaved sequence of pyramidal and polygonal numbers.at n=38A081284
• Starting positions of strings of four 6's in the decimal expansion of Pi.at n=6A083626
• Convolution of A008805 (triangular numbers repeated) with itself.at n=36A177747
• a(n) = a(n-1) + 3*a(n-2) -2*a(n-3) - 2*a(n-4), where a(0) = -1, a(1) = 0, a(2) = 0, a(3) = 1.at n=22A295730
• Number of tetrahedra in the n X n white bishop graph.at n=21A391027
• Number of tetrahedra in the n X n black bishop graph.at n=21A391766