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A010346 Base-5 Armstrong or narcissistic numbers (written in base 10). 17
1, 2, 3, 4, 13, 18, 28, 118, 289, 353, 419, 4890, 4891, 9113, 1874374, 338749352, 2415951874 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Zero would also satisfy the definition as the other single-digit terms, but here only positive numbers are considered. - M. F. Hasler, Nov 20 2019
LINKS
Eric Weisstein's World of Mathematics, Narcissistic Number
PROG
(PARI) A010346=select( is_A010346(n)={n==vecsum([d^#n|d<-n=digits(n, 5)])}, [0..9999]) \\ This yields only terms < 10^4 (i.e., all but the last 3 terms), for illustration of is_A010346(). In older versions of PARI, use {n==sum(i=1, #n=digits(n, 5), n[i]^#n)}. - M. F. Hasler, Nov 20 2019
CROSSREFS
Cf. A010345 (a(n) written in base 5).
In other bases: A010344 (base 4), A010348 (base 6), A010350 (base 7), A010354 (base 8), A010353 (base 9), A005188 (base 10), A161948 (base 11), A161949 (base 12), A161950 (base 13), A161951 (base 14), A161952 (base 15), A161953 (base 16).
Sequence in context: A236440 A357954 A162222 * A295621 A295755 A089142
KEYWORD
base,fini,full,nonn
AUTHOR
EXTENSIONS
Edited by Joseph Myers, Jun 28 2009
STATUS
approved

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Last modified March 29 08:48 EDT 2024. Contains 371268 sequences. (Running on oeis4.)