id:A121663 - OEIS Search Results

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a(0) = 1; if n = 2^k, a(n) = k+2, otherwise a(n)=(A000523(n)+2)*a(A053645(n)).

+0
2

1, 2, 3, 6, 4, 8, 12, 24, 5, 10, 15, 30, 20, 40, 60, 120, 6, 12, 18, 36, 24, 48, 72, 144, 30, 60, 90, 180, 120, 240, 360, 720, 7, 14, 21, 42, 28, 56, 84, 168, 35, 70, 105, 210, 140, 280, 420, 840, 42, 84, 126, 252, 168, 336, 504, 1008, 210, 420, 630, 1260, 840, 1680 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`Each n occurs A045778(n) times in the sequence.`
	PROGRAM	`(Scheme:) (define (A121663 n) (cond ((zero? n) 1) ((pow2? n) (+ 2 (A000523 n))) (else (* (+ 2 (A000523 n)) (A121663 (A053645 n))))))` `(define (pow2? n) (and (> n 0) (zero? (A004198bi n (- n 1)))))`
	CROSSREFS	`Cf. Bisection of A096111.` `Sequence in context: A096113 A110797 A083872 this_sequence A096112 A052330 A059900` `Adjacent sequences: A121660 A121661 A121662 this_sequence A121664 A121665 A121666`
	KEYWORD	`nonn`
	AUTHOR	`Antti Karttunen (His-Firstname.His-Surname(AT)gmail.com), Aug 25 2006`

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Last modified December 7 08:40 EST 2009. Contains 170430 sequences.

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