A026907 - OEIS

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A026907 as a triangular array

										1
									13		13
								28		44		28
							46		90		90		46
						67		154		198		154		67
					91		239		370		370		239		91
				118		348		627		758		627		348		118
			148		484		993		1403		1403		993		484		148
		181		650		1495		2414		2824		2414		1495		650		181
	217		849		2163		3927		5256		5256		3927		2163		849		217

A026907 as a square array

1	13	28	46	67	91	118	148	181	217
13	44	90	154	239	348	484	650	849
28	90	198	370	627	993	1495	2163
46	154	370	758	1403	2414	3927
67	239	627	1403	2824	5256
91	348	993	2414	5256
118	484	1495	3927
148	650	2163
181	849
217

A026907 as an upper right triangle

1	13	28	46	67	91	118	148	181	217
	13	44	90	154	239	348	484	650	849
		28	90	198	370	627	993	1495	2163
			46	154	370	758	1403	2414	3927
				67	239	627	1403	2824	5256
					91	348	993	2414	5256
						118	484	1495	3927
							148	650	2163
								181	849
									217