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 A063432 Triangle read by rows in which k-th entry in row n is representation of n in base k, for 1 <= k <= n. 6
 1, 11, 10, 111, 11, 10, 1111, 100, 11, 10, 11111, 101, 12, 11, 10, 111111, 110, 20, 12, 11, 10, 1111111, 111, 21, 13, 12, 11, 10, 11111111, 1000, 22, 20, 13, 12, 11, 10, 111111111, 1001, 100, 21, 14, 13, 12, 11, 10, 1111111111, 1010, 101, 22, 20, 14, 13 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Representation of n in base 1 is defined to be a concatenation of n 1's. It is difficult to write twenty-one in base 11 using decimal digits. Representation in bases greater than 10 are written in base 10. This is really nasty! - N. J. A. Sloane, Dec 06 2002 LINKS EXAMPLE Rows start (1), (11, 10), (111, 11, 10), (1111, 100, 11, 10), etc. MATHEMATICA f[n_] := Flatten[ Append[ {FromDigits[ Table[1, {n}]] }, Table[ FromDigits[ IntegerDigits[n, i]], {i, 2, n}]]]; Flatten[ Table[ f[n], {n, 1, 10}]] (* Robert G. Wilson v *) CROSSREFS Cf. A063431. Rows are effectively the reverse of A001731, A001732, A001733, A001734, A001735, A001736, A008707, A008708, A008709, A008710, A008711, A008712, A008713, A008714, A008715, A008716, A008717, etc. Columns are truncated versions of A000042, A007088, A007089, A007090, A007091, A007092, A007093, A007094, A007095, A000027 and perhaps A055649, etc. Sequence in context: A105028 A014550 A070836 * A038324 A164125 A212529 Adjacent sequences:  A063429 A063430 A063431 * A063433 A063434 A063435 KEYWORD base,nonn,tabl AUTHOR Henry Bottomley, Jul 20 2001 STATUS approved

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