id:A055259 - OEIS Search Results

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Sums of two powers of 8.

+0
1

2, 9, 16, 65, 72, 128, 513, 520, 576, 1024, 4097, 4104, 4160, 4608, 8192, 32769, 32776, 32832, 33280, 36864, 65536, 262145, 262152, 262208, 262656, 266240, 294912, 524288, 2097153, 2097160, 2097216, 2097664, 2101248, 2129920, 2359296 (list; table; graph; listen)

	OFFSET	`1,1`
	FORMULA	`a(n) = 8^(n-trinv(n))+8^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)=8^n+8^k, so as a sequence a(n) =8^A002262(n)+8^A003056(n).`
	EXAMPLE	`a(4) = 72 = 8^2+8^1`
	CROSSREFS	`Cf. A052216.` `Sequence in context: A101420 A097965 A075645 this_sequence A032299 A032211 A032136` `Adjacent sequences: A055256 A055257 A055258 this_sequence A055260 A055261 A055262`
	KEYWORD	`base,easy,nonn,tabl`
	AUTHOR	`Henry Bottomley (se16(AT)btinternet.com), Jun 22 2000`

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Last modified November 21 14:49 EST 2008. Contains 150807 sequences.

AT&T Labs Research