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A071987 225 written in base 15-n. 0
100, 121, 144, 169, 195, 225, 270, 341, 441, 1013, 1400, 3201, 22100, 11100001 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

Interesting because the beginning is so close to a sequence of perfect squares to base ten. Only 195 is different; it would be 196 in a sequence of perfect squares.

LINKS

Table of n, a(n) for n=0..13.

EXAMPLE

a(0) = 100 because we can write 225 = 100 (base 15).

MAPLE

seq((l-> parse(cat(seq(l[-i], i=1..nops(l)))))(convert(

     225, base, 15-n)), n=0..13);  # Alois P. Heinz, Mar 10 2020

MATHEMATICA

Array[FromDigits@ IntegerDigits[225, 15 - #] &, 14, 0] (* Michael De Vlieger, Mar 10 2020 *)

PROG

(PARI) a(n) = fromdigits(digits(225, 15-n));

vector(14, n, a(n-1)) \\ Michel Marcus, Mar 11 2020

CROSSREFS

Sequence in context: A088477 A328864 A143919 * A095633 A228103 A331543

Adjacent sequences:  A071984 A071985 A071986 * A071988 A071989 A071990

KEYWORD

base,fini,full,nonn

AUTHOR

Philip R. Turner (Phil.Turner(AT)cern.ch), Jun 17 2002

EXTENSIONS

a(13) corrected by Alois P. Heinz, Mar 10 2020

STATUS

approved

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Last modified July 30 07:55 EDT 2021. Contains 346348 sequences. (Running on oeis4.)