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A128304
Indices of 4th powers (of primes) in the 4-almost primes.
3
1, 8, 90, 385, 2556, 5138, 15590, 24646, 53993, 139199, 182476, 375363, 569617, 691012, 991150, 1613115, 2490040, 2849478, 4163793, 5263838, 5888203, 8100907, 9886861, 13102875, 18538021, 21816421, 23608907, 27525519, 29659283, 34290671
OFFSET
1,2
COMMENTS
A014613(a(n)) = A030514(n) = A000040(n)^4.
LINKS
EXAMPLE
a(3) = 90 as 625=5^4=prime(3)^4, the third 4th power in the 4-almost primes, is the 90th 4-almost prime.
CROSSREFS
KEYWORD
nonn
AUTHOR
Rick L. Shepherd, Mar 05 2007
STATUS
approved