id:A137988 - OEIS Search Results

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Decimal expansion of the number whose Pierce expansion has the sequence of double factorial numbers (A000165) as coefficients.

+0
4

3, 5, 2, 8, 0, 6, 4, 3, 8, 1, 0, 6, 6, 5, 0, 0, 3, 6, 4, 6, 2, 1, 2, 3, 6, 0, 5, 3, 1, 0, 7, 3, 0, 0, 8, 6, 3, 1, 1, 1, 4, 5, 9, 6, 9, 4, 4, 4, 9, 9, 0, 1, 7, 4, 0, 2, 7, 4, 9, 4, 6, 3, 1, 0, 7, 1, 8, 6, 4, 7, 0, 1, 5, 3, 3, 6, 5, 6, 5, 4, 4, 1, 4, 5, 6, 9, 0, 9, 1, 8, 9, 6, 0, 9, 4, 8, 3, 3, 9 (list; graph; listen)

	OFFSET	`0,1`
	LINKS	`Weisstein, Eric W., Pierce Expansion.` `Weisstein, Eric W., Engel Expansion.`
	MAPLE	`P:=proc(n) local a, i, j, k, w; a:=0; w:=1; for i from 0 by 1 to n do k:=i; j:=i-2; while j>0 do k:=kj; j:=j-2; od; if (i=0 or i=1) then k:=1; fi; if i=2 then k:=2; fi; w:=wk; a:=a+(-1)^i/w; print(evalf(a, 100)); od; end: P(100);`
	CROSSREFS	`Cf. A000142, A137986, A137987, A137989.` `Sequence in context: A026208 A120837 A095749 this_sequence A160092 A026193 A026143` `Adjacent sequences: A137985 A137986 A137987 this_sequence A137989 A137990 A137991`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paolo P. Lava & Giorgio Balzarotti (ppl(AT)spl.at), Feb 26 2008`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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