A319805 - OEIS

A319805

a(n) = A319722(n) + A319653(n).

0, 2, 4, 6, 8, 6, 12, 18, 24, 30, 12, 18, 24, 30, 36, 18, 24, 30, 36, 42, 24, 30, 36, 42, 48, 26, 36, 62, 88, 114, 36, 62, 88, 114, 140, 62, 88, 98, 124, 150, 88, 114, 124, 134, 160, 114, 140, 150, 160, 170, 52, 62, 72, 98, 124, 62, 88, 98, 124, 150, 72, 98, 124, 150, 176

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,2

COMMENTS

This sequence is different from A055950.

LINKS

Seiichi Manyama, Table of n, a(n) for n = 0..3124

MAPLE

a:= n-> (l-> add((l[i]+l[-i])*5^(i-1), i=1..nops(l)))(sort(convert(n, base, 5))):

seq(a(n), n=0..64); # Alois P. Heinz, Aug 07 2024

MATHEMATICA

Table[FromDigits[Reverse[#], 5] + FromDigits[#, 5] & [Sort[IntegerDigits[n, 5]]], {n, 0, 100}] (* Paolo Xausa, Aug 07 2024 *)

PROG

(PARI) a(n) = my(nd=digits(n, 5)); fromdigits(vecsort(nd), 5) + fromdigits(vecsort(nd, , 4), 5); \\ Michel Marcus, Sep 28 2018

CROSSREFS

Base b: A319785 (b=2), A319803 (b=3), A319804 (b=4), this sequence (b=5), A319806 (b=6), A319807 (b=7), A319808 (b=8), A319747 (b=9), A052008 (b=10).

Cf. A055950, A319653, A319722.

Sequence in context: A355311 A299477 A360409 * A055950 A294428 A196698

Adjacent sequences: A319802 A319803 A319804 * A319806 A319807 A319808

KEYWORD

nonn,look,base

AUTHOR

Seiichi Manyama, Sep 28 2018

STATUS

approved