id:A166048 - OEIS Search Results

Search: id:A166048

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a(n) = (A166049(n)-1)/4.

+0
2

0, 1, 2, 3, 5, 6, 9, 12, 20, 21, 23, 30, 41, 42, 56, 72, 90, 110, 132, 156, 182, 210, 240, 272, 306, 342, 380, 420, 462, 506, 552, 600, 650, 702, 756, 812, 870, 930, 992, 1056, 1122, 1190, 1260, 1332, 1406, 1482, 1560, 1640, 1722, 1806, 1892, 1980, 2070 (list; graph; listen)

	OFFSET	`1,3`
	COMMENT	`Indexing sequence for A166049.`
	PROGRAM	`(MIT Scheme with macro MATCHING-POS by AK):` `(define A166048 (MATCHING-POS 1 0 (lambda (n) (let ((w (A016813 n)) (hp (A005843 n))) (let loop ((i 1) (s 1)) (cond ((< s 0) #f) ((>= i hp) #t) (else (loop (1+ i) (+ s (jacobi-symbol (1+ i) w))))))))))`
	CROSSREFS	`Sequence in context: A084993 A046966 A035948 this_sequence A094873 A018126 A087900` `Adjacent sequences: A166045 A166046 A166047 this_sequence A166049 A166050 A166051`
	KEYWORD	`nonn`
	AUTHOR	`Antti Karttunen (His-Firstname.His-Surname(AT)gmail.com), Oct 08 2009`

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.

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