id:A133254 - OEIS Search Results

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Sums of a triangular number A000217 > 0 and a square A000290 > 0.

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	OFFSET	`1,1`
	FORMULA	`{a + b such that a is in A000217 and b is in A000290 and a,b > 0}. Sum set of {n^2: n>0} and {n*(n+1)/2): n>0}.`
	EXAMPLE	`a(1) = 2 = 1 + 1 = A000217(1) + A000290(1).` `a(2) = 4 = 1 + 3 = A000217(2) + A000290(1).` `a(3) = 5 = 1 + 4 = A000217(1) + A000290(2).` `a(4) = 7 = 3 + 4 = A000217(2) + A000290(2) = 6 + 1 = A000217(2) + A000290(1).` `a(5) = 10 = 1 + 9 = A000217(1) + A000290(3) = 6 + 4 = A000217(3) + A000290(2).`
	CROSSREFS	`Cf. A000217, A000290.` `Sequence in context: A078404 A056908 A060565 this_sequence A080725 A139283 A024914` `Adjacent sequences: A133251 A133252 A133253 this_sequence A133255 A133256 A133257`
	KEYWORD	`easy,nonn`
	AUTHOR	`Jonathan Vos Post (jvospost3(AT)gmail.com), Dec 19 2007`

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Last modified December 4 20:00 EST 2008. Contains 151309 sequences.

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