A319804 a(n) = A319720(n) + A319652(n).

0, 2, 4, 6, 5, 10, 15, 20, 10, 15, 20, 25, 15, 20, 25, 30, 17, 25, 42, 59, 25, 42, 59, 76, 42, 59, 67, 84, 59, 76, 84, 92, 34, 42, 50, 67, 42, 59, 67, 84, 50, 67, 84, 101, 67, 84, 101, 109, 51, 59, 67, 75, 59, 76, 84, 92, 67, 84, 101, 109, 75, 92, 109, 126, 65, 85, 150, 215

Offset: 0

Author

Seiichi Manyama, Sep 28 2018

Keywords

• nonn
• base

Comments

This sequence is different from A055948.

Links

• Seiichi Manyama, Table of n, a(n) for n = 0..4095

Crossrefs

Base b: A319785 (b=2), A319803 (b=3), this sequence (b=4), A319805 (b=5), A319806 (b=6), A319807 (b=7), A319808 (b=8), A319747 (b=9), A052008 (b=10).

Cf. A055948, A319652, A319720.

Programs

Mathematica

Table[FromDigits[Reverse[#], 4] + FromDigits[#, 4] & [Sort[IntegerDigits[n, 4]]], {n, 0, 100}] (* Paolo Xausa, Aug 07 2024 *)

PARI

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