A131398 - OEIS

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A131398 as a triangular array

										1
									1		1
								2		4		1
							2		8		7		1
						2		11		17		10		1
					2		14		29		29		13		1
				2		17		44		59		44		16		1
			2		20		62		104		104		62		19		1
		2		23		83		167		209		167		83		22		1
	2		26		107		251		377		377		251		107		25		1

A131398 as a square array

1	1	2	2	2	2	2	2	2	2
1	4	8	11	14	17	20	23	26
1	7	17	29	44	62	83	107
1	10	29	59	104	167	251
1	13	44	104	209	377
1	16	62	167	377
1	19	83	251
1	22	107
1	25
1

A131398 as an upper right triangle

1	1	2	2	2	2	2	2	2	2
	1	4	8	11	14	17	20	23	26
		1	7	17	29	44	62	83	107
			1	10	29	59	104	167	251
				1	13	44	104	209	377
					1	16	62	167	377
						1	19	83	251
							1	22	107
								1	25
									1