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A055013
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Sum of 4th powers of digits of n.
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10
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0, 1, 16, 81, 256, 625, 1296, 2401, 4096, 6561, 1, 2, 17, 82, 257, 626, 1297, 2402, 4097, 6562, 16, 17, 32, 97, 272, 641, 1312, 2417, 4112, 6577, 81, 82, 97, 162, 337, 706, 1377, 2482, 4177, 6642, 256, 257, 272, 337, 512, 881, 1552, 2657, 4352, 6817
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,3
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FORMULA
| a(n)=sum{k>0, (floor(n/10^k)-10*floor(n/10^(k+1)))^4}. - Hieronymus Fischer (Hieronymus.Fischer(AT)gmx.de), Jun 25 2007
a(10n+k)=a(n)+k^4, 0<=k<10. - Hieronymus Fischer (Hieronymus.Fischer(AT)gmx.de), Jun 25 2007
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MAPLE
| A055013 := proc(n)
add(d^4, d=convert(n, base, 10)) ;
end proc:
seq(A055013(n), n=0..20) ; # R. J. Mathar, Nov 07 2011
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CROSSREFS
| Cf. A003132, A055012.
Cf. A007953, A055017, A076313, A076314.
Sequence in context: A096020 A016898 A017672 * A080150 A000583 A050751
Adjacent sequences: A055010 A055011 A055012 * A055014 A055015 A055016
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KEYWORD
| base,nonn
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AUTHOR
| Henry Bottomley (se16(AT)btinternet.com), May 31 2000
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