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A120426
n-th number with the same prime signature as n.
3
1, 3, 5, 49, 11, 22, 17, 6859, 529, 35, 31, 76, 41, 51, 55, 7890481, 59, 124, 67, 148, 74, 77, 83, 472, 9409, 87, 1092727, 212, 109, 285, 127, 38579489651, 115, 118, 119, 14884, 157, 129, 133, 856, 179, 385, 191, 356, 363, 155, 211, 2512, 51529, 412, 177, 425
OFFSET
1,2
LINKS
Eric Weisstein's World of Mathematics, Prime Signature
FORMULA
If p is prime, a(p) = prime(p). a(p^k) = prime(p^k)^k. More generally, if n = m^k, a(n) = [n-th number whose prime signature is the same as m]^k.
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved