A209898 - OEIS

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A209898 as a triangular array

											11
										15		15
									19		19		19
								27		23		23		27
							35		31		27		31		35
						51		39		35		35		39		51
					67		55		43		43		43		55		67
				99		71		59		51		51		59		71		99
			131		103		75		67		59		67		75		103		131
		195		135		107		83		75		75		83		107		135		195
	259		199		139		115		91		91		91		115		139		199

A209898 as a square array

11	15	19	27	35	51	67	99	131	195	259
15	19	23	31	39	55	71	103	135	199
19	23	27	35	43	59	75	107	139
27	31	35	43	51	67	83	115
35	39	43	51	59	75	91
51	55	59	67	75	91
67	71	75	83	91
99	103	107	115
131	135	139
195	199

A209898 as an upper right triangle

11	15	19	27	35	51	67	99	131	195	259
	15	19	23	31	39	55	71	103	135	199
		19	23	27	35	43	59	75	107	139
			27	31	35	43	51	67	83	115
				35	39	43	51	59	75	91
					51	55	59	67	75	91
						67	71	75	83	91
							99	103	107	115
								131	135	139
									195	199