111430

Appears in sequences

• Number of solutions to +-1 +- 3 +- 6 +- ... +- n(n+1)/2 = 0.at n=27A158380
• Number of solutions to +-1 +- 3 +- 6 +- 10 +- ... +- n*(n + 1)/2 = 0 or 1.at n=27A350287