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A248110 Table read by rows: n-th row contains the q successors of n, where q = A007953(n), the digit sum of n in decimal representation. 3
2, 3, 4, 4, 5, 6, 5, 6, 7, 8, 6, 7, 8, 9, 10, 7, 8, 9, 10, 11, 12, 8, 9, 10, 11, 12, 13, 14, 9, 10, 11, 12, 13, 14, 15, 16, 10, 11, 12, 13, 14, 15, 16, 17, 18, 11, 12, 13, 13, 14, 15, 14, 15, 16, 17, 15, 16, 17, 18, 19, 16, 17, 18, 19, 20, 21, 17, 18, 19, 20 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
First 9 rows coincide with triangle A108872;
T(n,1) = n + 1; T(n,A007953(n)) = n + A007953(n) = A062028(n).
LINKS
EXAMPLE
. n | T(n,*) | A007953(n)
. ---+------------------------------------------+-----------
. 1 | 2 | 1
. 2 | 3, 4 | 2
. 3 | 4, 5, 6 | 3
. 4 | 5, 6, 7, 8 | 4
. 5 | 6, 7, 8, 9, 10 | 5
. 6 | 7, 8, 9, 10, 11, 12 | 6
. 7 | 8, 9, 10, 11, 12, 13, 14 | 7
. 8 | 9, 10, 11, 12, 13, 14, 15, 16 | 8
. 9 | 10, 11, 12, 13, 14, 15, 16, 17, 18 | 9
. 10 | 11 | 1
. 11 | 12, 13 | 2
. 12 | 13, 14, 15 | 3
. 13 | 14, 15, 16, 17 | 4
. 14 | 15, 16, 17, 18, 19 | 5
. 15 | 16, 17, 18, 19, 20, 21 | 6
. 16 | 17, 18, 19, 20, 21, 22, 23 | 7
. 17 | 18, 19, 20, 21, 22, 23, 24, 25 | 8
. 18 | 19, 20, 21, 22, 23, 24, 25, 26, 27 | 9
. 19 | 20, 21, 22, 23, 24, 25, 26, 27, 28, 29 | 10
. 20 | 21, 22 | 2
PROG
(Haskell)
a248110 n k = a248110_tabf !! (n-1) !! (k-1)
a248110_row n = a248110_tabf !! (n-1)
a248110_tabf = map (\x -> [x + 1 .. x + a007953 x]) [1 ..]
CROSSREFS
Cf. A007953 (row lengths), A062028, A108872.
Sequence in context: A064064 A101504 A125568 * A108872 A147847 A370386
KEYWORD
nonn,base,tabf
AUTHOR
Reinhard Zumkeller, Oct 01 2014
STATUS
approved

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Last modified July 14 04:38 EDT 2024. Contains 374291 sequences. (Running on oeis4.)