266815

Appears in sequences

• Triangular numbers containing 2k digits in which the sum of the first k digits = that of the rest.at n=24A068898
• Number of partitions of 5n such that cn(1,5) = cn(4,5) = cn(2,5) = cn(3,5) < cn(0,5).at n=19A202086
• Triangular numbers representable as x*y+x+y such that x and y are triangular numbers, x>=y>0.at n=36A259745
• Triangular numbers representable as x*y+x+y such that x and y are triangular numbers, x>=y>1.at n=30A259746
• a(n) is the largest number in row n of A380920.at n=42A380967