A067511 Powers of 7 with digit sum divisible by 7.

7, 2401, 117649, 40353607, 1977326743, 9387480337647754305649, 65712362363534280139543, 459986536544739960976801, 15286700631942576193765185769276826401, 5243338316756303634461458718861951455543, 12589255298531885026341962383987545444758743

Offset: 1

Author

Amarnath Murthy, Feb 11 2002

Keywords

• base
• easy
• nonn

Links

• Andrew Howroyd, Table of n, a(n) for n = 1..150

Crossrefs

Intersection of A000420 and A273159.

Cf. A067499, A067500, A067501, A067502, A067503, A067504, A067505, A067506, A067507, A067508, A067509, A067510.

Programs

PARI

lista(n)={my(L=List(),k=0);while(#LAndrew Howroyd, Sep 17 2024

Extensions

More terms from Sascha Kurz, Mar 18 2002

Offset changed and a(10) onwards from Andrew Howroyd, Sep 17 2024