A322046 Irregular triangle read by rows: a Pascal "rhombus", third in the sequence after A059317 and A027907.

1, 1, 1, 1, 1, 2, 4, 2, 1, 1, 3, 8, 10, 8, 3, 1, 1, 4, 13, 24, 31, 24, 13, 4, 1, 1, 5, 19, 45, 78, 93, 78, 45, 19, 5, 1, 1, 6, 26, 74, 158, 248, 290, 248, 158, 74, 26, 6, 1

Offset: 0

Author

N. J. A. Sloane, Dec 07 2018

Keywords

• nonn
• tabf
• more

Examples

			Triangle begins:
  1,
  1,1,1,
  1,2,4,2,1,
  1,3,8,10,8,3,1,,
  1,4,13,24,31,24,13,4,1,,
  1,5,19,45,78,93,78,45,19,5,1,,
  1,6,26,74,158,248,290,248,158,74,26,6,1,
  ...
		

Links

• Sheng-Liang Yang and Yuan-Yuan Gao, The Pascal rhombus and Riordan arrays, Fib. Q., 56:4 (2018), 337-347. See Fig. 4.

Crossrefs

Cf. A059317 and A027907.