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A146763
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Rank of terms ending in 0 in A061039.
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0
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0, 4, 10, 14, 20, 24, 30, 34, 40, 44, 50, 54, 60, 64, 70, 74, 80, 84, 90, 94, 100, 104, 110, 114, 120, 124, 130, 134, 140, 144, 150, 154, 160, 164, 170, 174, 180, 184, 190, 194, 200, 204
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| From Paschen spectrum of hydrogen.
Numbers that are congruent to 0 or 4 mod 10. - From DELEHAM Philippe, Oct 18 2011.
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FORMULA
| Conjecture: a(n)=10*n-a(n-1)-6 (with a(0)=0) [From Vincenzo Librandi, Nov 26 2010]
a(n)=Sum_k>=0 {A030308(n,k)*b(k)} with b(0)=4 and b(k)=5*2^k=A020714(k) for k>0. - From DELEHAM Philippe, Oct 18 2011.
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CROSSREFS
| Sequence in context: A116954 A102686 A099439 * A190346 A001581 A114335
Adjacent sequences: A146760 A146761 A146762 * A146764 A146765 A146766
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KEYWORD
| nonn,base
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AUTHOR
| Paul Curtz (bpcrtz(AT)free.fr), Nov 02 2008
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