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A278538
a(n) = index of the row where n is located in array A278505.
9
1, 1, 2, 1, 2, 1, 3, 1, 3, 1, 2, 1, 4, 1, 4, 1, 2, 1, 5, 1, 3, 1, 2, 1, 5, 1, 6, 1, 2, 1, 6, 1, 3, 1, 2, 1, 4, 1, 7, 1, 2, 1, 7, 1, 3, 1, 2, 1, 8, 1, 5, 1, 2, 1, 4, 1, 3, 1, 2, 1, 8, 1, 9, 1, 2, 1, 9, 1, 3, 1, 2, 1, 6, 1, 4, 1, 2, 1, 10, 1, 3, 1, 2, 1, 5, 1, 10, 1, 2, 1, 11, 1, 3, 1, 2, 1, 4, 1, 7, 1, 2, 1, 11, 1, 3, 1, 2, 1, 12, 1, 5, 1, 2, 1, 4, 1, 3, 1, 2, 1
OFFSET
1,3
COMMENTS
Ordinal transform of A278539 (most likely, but hinges on that also the columns of A278505 are strictly growing).
FORMULA
If A278169(n) = 1, a(n) = A100617(n), otherwise a(n) = A278528(n).
If n = A000960(k), a(n) = k, otherwise a(n) = number of the round in which n is removed in the Flavius sieve.
PROG
(Scheme)
(define (A278538 n) (if (not (zero? (A278169 n))) (A100617 n) (A278528 n)))
KEYWORD
nonn
AUTHOR
Antti Karttunen, Nov 23 2016
STATUS
approved