cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

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A113610 Sum of digits of all composite numbers between prime(n) and prime(n+1).

Original entry on oeis.org

0, 4, 6, 18, 3, 18, 9, 9, 40, 3, 35, 27, 6, 27, 43, 55, 6, 50, 36, 9, 65, 27, 70, 84, 36, 3, 18, 9, 9, 93, 27, 40, 12, 81, 6, 50, 53, 36, 58, 70, 9, 126, 12, 45, 18, 68, 83, 27, 12, 18, 55, 6, 99, 55, 58, 70, 9, 65, 45, 12, 135, 147, 27, 6, 27, 126, 50, 99, 15, 27, 70, 84, 68, 80, 36
Offset: 1

Views

Author

Amarnath Murthy, Nov 09 2005

Keywords

Comments

Conjecture: For n > 9 if a(n) > a(n+1) < a(n+2) then prime(n) and prime(n+1) form a twin prime pair.

Examples

			2 '' 3 '4' 5 '6' 7 '8910' 11 '12' 13 '141516' 17 '18' 19 '202122' 23 '2425262728' 29,...
		

Crossrefs

Cf. A175038. - Zak Seidov, Nov 13 2009

Programs

  • Mathematica
    Table[Total[Flatten[IntegerDigits/@Range[Prime[n]+1,Prime[n+1]-1]]],{n, 100}] (* Zak Seidov, Nov 13 2009 *)

Extensions

More terms from Elizabeth A. Blickley (Elizabeth.Blickley(AT)gmail.com), Mar 10 2006
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