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A096925
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Numbers n for which there are exactly four k such that n = k + (product of nonzero digits of k).
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8
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116, 405, 430, 474, 530, 546, 642, 744, 774, 836, 854, 855, 930, 958, 1038, 1055, 1070, 1088, 1104, 1110, 1116, 1134, 1154, 1162, 1236, 1366, 1400, 1405, 1418, 1430, 1455, 1530, 1642, 1744, 1774, 1836, 1854, 1855, 1930, 1958, 2112, 2137, 2185, 2199, 2205
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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EXAMPLE
| 279, 345, 381 and 401 are the only four k such that k + (product of nonzero digits of k) = 405, hence 405 is a term.
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PROG
| (PARI) {c=4; z=2210; v=vector(z); for(n=1, z+1, k=addpnd(n); if(k<=z, v[k]=v[k]+1)); for(j=1, length(v), if(v[j]==c, print1(j, ", ")))} \\for function addpnd see A096922
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CROSSREFS
| Cf. A063114, A096347, A096922 - A096924, A096926 - A096931.
Sequence in context: A105934 A179168 A184069 * A097231 A203251 A076044
Adjacent sequences: A096922 A096923 A096924 * A096926 A096927 A096928
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KEYWORD
| nonn,base
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AUTHOR
| Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), Jul 15 2004
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