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Search: id:A090580
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| A090580 |
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Number of numbers with 5 decimal digits and sum of digits = n. |
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+0
3
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| 1, 5, 15, 35, 70, 126, 210, 330, 495, 714, 992, 1330, 1725, 2170, 2654, 3162, 3675, 4170, 4620, 4998, 5283, 5460, 5520, 5460, 5283, 4998, 4620, 4170, 3675, 3162, 2654, 2170, 1725, 1330, 992, 714, 495, 330, 210, 126, 70, 35, 15, 5, 1
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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There are 90000 numbers with 5 decimal digits, the smallest being 10000 and the largest 99999.
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EXAMPLE
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a(2)=5: 10001, 10010, 10100, 11000, 20000.
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PROGRAM
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(PARI) b=vector(45, i, 0); for(n=10000, 99999, a=eval(Vec(Str(n))); b[sum(j=1, 5, a[j])]++); for(n=1, 45, print1(b[n], ", ")) - Herman Jamke (hermanjamke(AT)fastmail.fm), Oct 19 2006
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CROSSREFS
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Cf. A071817 3-digit numbers, A090579 4-digit numbers, A090581 6-digit numbers.
Sequence in context: A008487 A000743 A138779 this_sequence A000332 A140227 A049016
Adjacent sequences: A090577 A090578 A090579 this_sequence A090581 A090582 A090583
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KEYWORD
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base,fini,full,nonn
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AUTHOR
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Hugo Pfoertner (hugo(AT)pfoertner.org), Jan 12 2004
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