A071987 225 written in base 15-n.

100, 121, 144, 169, 195, 225, 270, 341, 441, 1013, 1400, 3201, 22100, 11100001

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: A352958 A328864 A143919 * A365820 A095633 A228103

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