156783

Appears in sequences

• 144*n^2 - n.at n=32A156635
• a(n) = 1089*n^2 - 33.at n=11A158692
• Expansion of (1 + x + x^2)/(1 - x^2 - 2*x^3).at n=29A159288
• Number of 6-element subsets of [n] whose sum is a triangular number.at n=31A320852