188220

Appears in sequences

• Revert transform of (1 - 3x + x^3)/(1 - 2x - 2x^2).at n=10A049136
• Number of relatively prime compositions of n with no 1's.at n=28A337450
• a(n) is the sum of n consecutive triangular numbers immediately preceding a triangular number T(k), which is also equal to the sum of n-1 consecutive triangular numbers immediately following T(k).at n=9A392441