id:A055261 - OEIS Search Results

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Sums of two powers of 16.

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2, 17, 32, 257, 272, 512, 4097, 4112, 4352, 8192, 65537, 65552, 65792, 69632, 131072, 1048577, 1048592, 1048832, 1052672, 1114112, 2097152, 16777217, 16777232, 16777472, 16781312, 16842752, 17825792, 33554432, 268435457 (list; table; graph; listen)

	OFFSET	`1,1`
	FORMULA	`a(n) = 16^(n-trinv(n))+16^trinv(n), where trinv(n) = floor((1+sqrt(1+8*n))/2) = A002262(n) and n-trinv(n) = A003056(n)` `Regarded as a triangle T(n, k)=16^n+16^k, so as a sequence a(n) =16^A002262(n)+16^A003056(n).`
	EXAMPLE	`a(4) = 272 = 16^2+16^1`
	CROSSREFS	`Cf. A052216.` `Sequence in context: A060387 A003336 A160770 this_sequence A100294 A018529 A041031` `Adjacent sequences: A055258 A055259 A055260 this_sequence A055262 A055263 A055264`
	KEYWORD	`base,easy,nonn,tabl`
	AUTHOR	`Henry Bottomley (se16(AT)btinternet.com), Jun 22 2000`

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Last modified December 6 22:55 EST 2009. Contains 170429 sequences.

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