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A249595
Positions of nonprimes in A249054.
3
1, 3, 5, 6, 8, 9, 10, 13, 15, 16, 20, 21, 24, 25, 26, 28, 29, 31, 33, 35, 36, 39, 40, 43, 44, 46, 48, 49, 52, 56, 57, 59, 60, 62, 63, 66, 67, 69, 70, 73, 76, 77, 79, 82, 83, 85, 86, 88, 91, 92, 93, 95, 96, 98, 99, 101, 103, 104, 106, 107, 110, 112, 114, 115
OFFSET
1,2
COMMENTS
A249054(a(n)) = A018252(n); sequence is strictly increasing, i.e. all nonprimes occur in A249054 in natural order, see also A249594.
LINKS
PROG
(Haskell)
import Data.List (elemIndex); import Data.Maybe (fromJust)
a249595 = (+ 1) . fromJust . (`elemIndex` a249054_list) . a018252
CROSSREFS
Cf. A018252, A026233, A049084, A239968, A249054, A249594 (complement).
Sequence in context: A026430 A002150 A153264 * A133561 A095117 A184675
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Nov 03 2014
STATUS
approved