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A296091 a(1) = 1 and for n > 1, the least number with the same prime signature as sigma(n)-1. 5
1, 2, 2, 6, 2, 2, 2, 6, 12, 2, 2, 8, 2, 2, 2, 30, 2, 6, 2, 2, 2, 6, 2, 2, 30, 2, 6, 6, 2, 2, 2, 6, 2, 2, 2, 60, 2, 2, 6, 2, 2, 6, 2, 2, 6, 2, 2, 6, 24, 12, 2, 2, 2, 6, 2, 6, 2, 2, 2, 2, 2, 6, 2, 60, 2, 6, 2, 8, 6, 6, 2, 6, 2, 2, 6, 2, 6, 2, 2, 6, 120, 8, 2, 2, 2, 2, 6, 2, 2, 2, 6, 2, 2, 6, 6, 2, 2, 30, 6, 216, 2, 6, 2, 6, 2 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
FORMULA
a(1) = 1; for n > 1, a(n) = A046523(A000203(n)-1) = A046523(A039653(n)).
PROG
(Scheme) (define (A296091 n) (if (= 1 n) n (A046523 (+ -1 (A000203 n)))))
CROSSREFS
Cf. also A276528, A296092.
Sequence in context: A053214 A077198 A046110 * A352892 A126889 A205030
KEYWORD
nonn
AUTHOR
Antti Karttunen, Dec 07 2017
STATUS
approved

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Last modified February 23 10:47 EST 2024. Contains 370276 sequences. (Running on oeis4.)