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A256825 Numbers with digits in strictly decreasing order containing digit 1. 3
1, 10, 21, 31, 41, 51, 61, 71, 81, 91, 210, 310, 321, 410, 421, 431, 510, 521, 531, 541, 610, 621, 631, 641, 651, 710, 721, 731, 741, 751, 761, 810, 821, 831, 841, 851, 861, 871, 910, 921, 931, 941, 951, 961, 971, 981, 3210, 4210, 4310, 4321, 5210, 5310, 5321 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

a(n) = possible values of A256824(m) in increasing order where A256824(m) = reverse concatenation of distinct digits of all divisors of m in base 10.

There are precisely 512 terms. Maximal term is 9876543210.

Subsequence of A009995 (numbers with digits in strictly decreasing order).

See A256826 - the smallest number k such that A256824(k) = a(n).

LINKS

Jaroslav Krizek, Table of n, a(n) for n = 1..512 (complete list)

EXAMPLE

21 is in sequence because there are numbers m such that A256824(m) = 21 (for m = 2, 22, 121, 211, 2111, ...).

PROG

(Excel) [Row n = 1 … 1023; Column A: A(n) = A009995(n); Column B: B(n) =  =IF(FIND("1"; A(n); 1)>0; A(n)); Arrangement of column B]

(PARI) lista(nn) = for (n=1, nn, if ((d = digits(n)) && ((sd=vecsort(d, , 8))==Vecrev(d)) && vecsearch(sd, 1), print1(n, ", "))); \\ Michel Marcus, Apr 11 2015

CROSSREFS

Cf. A009995, A095050, A243534, A256824, A256826.

Sequence in context: A078209 A265415 A245071 * A190326 A185691 A042291

Adjacent sequences:  A256822 A256823 A256824 * A256826 A256827 A256828

KEYWORD

nonn,base,fini,full

AUTHOR

Jaroslav Krizek, Apr 10 2015

STATUS

approved

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Last modified November 14 15:15 EST 2019. Contains 329126 sequences. (Running on oeis4.)