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Search: id:A140131
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| A140131 |
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a(n)=a(n-1)+a(n-2)+Sum_digits[a(n-1)]+Sum_digits[a(n-2)], with a(0)=0 and a(1)=1. |
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+0
2
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| 0, 1, 2, 6, 16, 35, 66, 121, 203, 333, 550, 902, 1473, 2401, 3896, 6330, 10264, 16619, 26919, 43588, 70562, 114198, 184804, 299051, 483906, 783013, 1266971, 2050038, 3317059, 5367143, 8684259, 14051473, 22735799, 36787341, 59523223, 96310634
(list; graph; listen)
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OFFSET
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0,3
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MAPLE
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P:=proc(n) local a, b, c, i, k, w, x; a:=0; b:=1; print(a); print(b); for i from 1 by 1 to n do w:=0; k:=a; while k>0 do w:=w+k-(trunc(k/10)*10); k:=trunc(k/10); od; x:=0; k:=b; while k>0 do x:=x+k-(trunc(k/10)*10); k:=trunc(k/10); od; c:=b; b:=a+b+w+x; a:=c; print(b); od; end: P(100);
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CROSSREFS
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Cf. A016052, A047892, A047897-A047900, A047902, A047903, A055263, A134268, A135210, A140132.
Adjacent sequences: A140128 A140129 A140130 this_sequence A140132 A140133 A140134
Sequence in context: A005996 A032091 A060354 this_sequence A005676 A038503 A079990
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KEYWORD
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easy,nonn
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AUTHOR
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Paolo P. Lava & Giorgio Balzarotti (ppl(AT)spl.at), May 09 2008
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