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A134703 Powerful numbers (2b): a sum of nonnegative powers of its digits. 6
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 24, 43, 63, 89, 132, 135, 153, 175, 209, 224, 226, 254, 258, 262, 263, 264, 267, 283, 308, 332, 333, 334, 347, 357, 370, 371, 372, 373, 374, 375, 376, 377, 378, 379, 407, 445, 463, 472, 518, 538, 598, 629, 635, 653, 675, 730, 731, 732, 733, 734 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
COMMENTS
Here 0 digits may be used, with the convention that 0^0 = 1. Of course 0^1 = 0, so one is free to use the 0 digit to get an extra 1, or not.
LINKS
FORMULA
If n = d_1 d_2 ... d_k in decimal then there are integers m_1 m_2 ... m_k >= 0 such that n = d_1^m_1 + ... + d_k^m_k.
EXAMPLE
43 = 4^2 + 3^3; 254 = 2^7 + 5^3 + 4^0 = 128 + 125 + 1.
209 = 2^7 + 0^1 + 9^2.
732 = 7^0 + 3^6 + 2^1.
CROSSREFS
Different from A007532 and A061862, which are variations.
Sequence in context: A116960 A126957 A228187 * A061862 A007532 A349279
KEYWORD
base,nonn
AUTHOR
David W. Wilson, Sep 05 2009
STATUS
approved

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Last modified June 21 10:49 EDT 2024. Contains 373544 sequences. (Running on oeis4.)