5108806domain: NAppears in sequencesNumbers simultaneously triangular and centered triangular.at n=6A128862Triangular numbers that are the sum of three consecutive triangular numbers.at n=5A129803Number of n X 3 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 1 1 and 1 1 0 vertically.at n=14A208103