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A334217 Irregular table T(n, k) read by rows, n > 0 and k = 1..A334216(n); n-th row corresponds to distinct terms of n-th row of A334215, in ascending order. 1
1, 1, 2, 1, 3, 1, 2, 4, 1, 5, 1, 6, 1, 7, 1, 2, 8, 1, 3, 9, 1, 10, 1, 11, 1, 2, 12, 1, 13, 1, 14, 1, 15, 1, 2, 4, 16, 1, 17, 1, 3, 18, 1, 19, 1, 2, 20, 1, 21, 1, 22, 1, 23, 1, 2, 24, 1, 5, 25, 1, 26, 1, 3, 27, 1, 2, 28, 1, 29, 1, 30, 1, 31, 1, 2, 4, 32, 1, 33 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
LINKS
FORMULA
T(n, 1) = 1.
T(n, 2) = A261969(n) for any n > 1.
T(n, A334216(n)-1) = A000188(n) for any n > 1.
T(n, A334216(n)) = n.
EXAMPLE
The first rows are:
n n-th row
-- -------------
1 [1]
2 [1, 2]
3 [1, 3]
4 [1, 2, 4]
5 [1, 5]
6 [1, 6]
7 [1, 7]
8 [1, 2, 8]
9 [1, 3, 9]
10 [1, 10]
11 [1, 11]
12 [1, 2, 12]
13 [1, 13]
14 [1, 14]
15 [1, 15]
16 [1, 2, 4, 16]
PROG
(PARI) row(n) = { my (f=factor(n)); Set(apply (k -> prod (i=1, #f~, f[i, 1]^(f[i, 2]\k)), [1..1+if (n==1, 0, vecmax(f[, 2]~))])) }
CROSSREFS
Sequence in context: A275280 A319845 A319847 * A334431 A342011 A087295
KEYWORD
nonn,tabf
AUTHOR
Rémy Sigrist, Apr 19 2020
STATUS
approved

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Last modified March 28 18:04 EDT 2024. Contains 371254 sequences. (Running on oeis4.)