id:A051237 - OEIS Search Results

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Lexicographically earliest Prime Pyramid, read by rows.

+0
8

1, 1, 2, 1, 2, 3, 1, 2, 3, 4, 1, 4, 3, 2, 5, 1, 4, 3, 2, 5, 6, 1, 4, 3, 2, 5, 6, 7, 1, 2, 3, 4, 7, 6, 5, 8, 1, 2, 3, 4, 7, 6, 5, 8, 9, 1, 2, 3, 4, 7, 6, 5, 8, 9, 10, 1, 2, 3, 4, 7, 10, 9, 8, 5, 6, 11, 1, 2, 3, 4, 7, 10, 9, 8, 5, 6, 11, 12, 1, 2, 3, 4, 7, 6, 5, 12, 11, 8, 9, 10, 13, 1, 2, 3, 4, 7, 6, 13, 10 (list; graph; listen)

	OFFSET	`1,3`
	COMMENT	`Row n begins with 1, ends with n, and sum of any two adjacent entries is prime.`
	REFERENCES	`R. K. Guy, Unsolved Problems Number Theory, Section C1.`
	LINKS	`T. D. Noe, Rows n=1..100 of triangle, flattened` `Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics.`
	EXAMPLE	`1; 1 2; 1 2 3; 1 2 3 4; 1 4 3 2 5;...`
	CROSSREFS	`Cf. A036440, A051239.` `Adjacent sequences: A051234 A051235 A051236 this_sequence A051238 A051239 A051240` `Sequence in context: A119585 A066040 A066019 this_sequence A064379 A120418 A120853`
	KEYWORD	`tabf,nice,nonn,easy`
	AUTHOR	`njas`
	EXTENSIONS	`More terms from j.mccranie(AT)comcast.net.`

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Last modified October 9 14:06 EDT 2008. Contains 144831 sequences.

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