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A286564 Triangular table A286563 reversed. 4
1, 1, 1, 1, 0, 1, 1, 0, 2, 1, 1, 0, 0, 0, 1, 1, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 1, 0, 3, 1, 1, 0, 0, 0, 0, 0, 2, 0, 1, 1, 0, 0, 0, 0, 1, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 1, 0, 1, 1, 2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 1 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,9

COMMENTS

See A286563.

LINKS

Antti Karttunen, Table of n, a(n) for n = 1..7875; the first 125 rows of the triangle

EXAMPLE

The first fifteen rows of this triangular table:

  1,

  1, 1,

  1, 0, 1,

  1, 0, 2, 1,

  1, 0, 0, 0, 1,

  1, 0, 0, 1, 1, 1,

  1, 0, 0, 0, 0, 0, 1,

  1, 0, 0, 0, 1, 0, 3, 1,

  1, 0, 0, 0, 0, 0, 2, 0, 1,

  1, 0, 0, 0, 0, 1, 0, 0, 1, 1,

  1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,

  1, 0, 0, 0, 0, 0, 1, 0, 1, 1, 2, 1,

  1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,

  1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 1,

  1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 1

MATHEMATICA

Table[If[k == 1, 1, IntegerExponent[n, k]], {n, 15}, {k, n, 1, -1}] // Flatten (* Michael De Vlieger, May 20 2017 *)

PROG

(Scheme) (define (A286564 n) (A286561bi (A002024 n) (A004736 n))) ;; For A286561bi see A286561.

(Python)

def T(n, k):

    i=1

    if k==1: return 1

    while n%(k**i)==0:

        i+=1

    return i-1

for n in xrange(1, 21): print [T(n, k) for k in xrange(1, n + 1)] [::-1] # Indranil Ghosh, May 20 2017

CROSSREFS

Cf. A286561, A286563.

Cf. A169594 (row sums).

Sequence in context: A064692 A286106 A079677 * A316359 A080080 A093662

Adjacent sequences:  A286561 A286562 A286563 * A286565 A286566 A286567

KEYWORD

nonn,tabl

AUTHOR

Antti Karttunen, May 20 2017

STATUS

approved

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Last modified June 18 15:25 EDT 2019. Contains 324213 sequences. (Running on oeis4.)