A198787 - OEIS

A198787 as a triangular array

0

0 1

0 2 3

0 4 5 6

0 6 8 9 10

0 9 12 13 14 15

0 12 16 18 19 20 21

0 16 21 24 25 26 27 28

0 20 27 30 32 33 34 35 36

0 25 33 37 40 41 42 43 44 45

0 30 40 45 48 50 51 52 53 54 55

0 36 48 54 57 60 61 62 63 64 65 66

0 42

0 0 0 0 0 0 0 0 0 0 0 0 0

1 2 4 6 9 12 16 20 25 30 36 42

3 5 8 12 16 21 27 33 40 48

6 9 13 18 24 30 37 45 54

10 14 19 25 32 40 48 57

15 20 26 33 41 50 60

21 27 34 42 51 61

28 35 43 52 62

36 44 53 63

45 54 64

55 65

66