A327577 Numbers of zeroless polydivisible numbers with all digits the same in base n.

1, 4, 5, 10, 7, 26, 11, 20, 19, 32, 17, 52, 22, 36, 38, 44, 28, 78, 32, 64, 49, 60, 38, 104, 47, 70, 61, 78, 49, 196, 53, 88, 75, 94, 66, 162, 64, 104, 88, 134, 70, 216, 74, 120, 123, 128, 80, 214, 85, 168, 117, 144, 91, 240, 103, 162, 131, 160, 101, 392, 108, 172, 152, 178, 122, 296

Offset: 2

Author

Seiichi Manyama, Sep 17 2019

Keywords

• nonn
• base
• look

Examples

			n | zeroless polydivisible numbers with all digits the same in base n
--+------------------------------------------------------------------
2 | [1]
3 | [1, 11], [2, 22]
4 | [1], [2, 22, 222], [3]
So a(2) = 1, a(3) = 4, a(4) = 5.
		

Links

• Seiichi Manyama, Table of n, a(n) for n = 2..10000
• Wikipedia, Polydivisible number.

Crossrefs

Cf. A327545, A327571.

Formula

a(n) = A327545(n,1).

a(n) = Sum_{k=1..n-1} A327571(n,k).