169332

Appears in sequences

• Cascadence of (1+2x)^2; a triangle, read by rows of 2n+1 terms, that retains its original form upon convolving each row with [1,4,4] and then letting excess terms spill over from each row into the initial positions of the next row such that only 2n+1 terms remain in row n for n>=0.at n=39A120914
• Oblong numbers n such that sigma(n) is a triangular number.at n=7A256150