A010343 Base-4 Armstrong or narcissistic positive numbers.

1, 2, 3, 130, 131, 203, 223, 313, 332, 1103, 3303

Offset: 1

Author

N. J. A. Sloane

Keywords

• base
• fini
• full
• nonn

Links

• Eric Weisstein's World of Mathematics, Narcissistic Number
• D. T. Winter, Table of Armstrong Numbers

Crossrefs

Cf. A010344 (a(n) written in base 10).

In other bases: A010345 (base 5), A010347 (base 6), A010349 (base 7), A010351 (base 8), A010352 (base 9), A005188 (base 10).

Programs

PARI

[fromdigits(digits(n,4))|n<-A010344] \\ M. F. Hasler, Nov 18 2019

Formula

a(n) = A007090(A010344(n)). - M. F. Hasler, Nov 18 2019

Extensions

Edited by Joseph Myers, Jun 28 2009

"Positive" added to definition. - N. J. A. Sloane, Nov 18 2019