A161178 - OEIS

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A161178

Sum of the double factorials of the digits of n.

1, 1, 2, 3, 8, 15, 48, 105, 384, 945, 2, 2, 3, 4, 9, 16, 49, 106, 385, 946, 3, 3, 4, 5, 10, 17, 50, 107, 386, 947, 4, 4, 5, 6, 11, 18, 51, 108, 387, 948, 9, 9, 10, 11, 16, 23, 56, 113, 392, 953, 16, 16, 17, 18, 23, 30, 63, 120, 399, 960, 49, 49, 50, 51, 56, 63, 96, 153, 432, 993 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,3`
	EXAMPLE	`a(24) = (2!!) + (4!!) = 2 + 8 = 10. a(35) = (3!!) + (5!!) = 3 + 15 = 18.`
	MAPLE	`A161178 := proc(n) if n = 0 then 1; else add(doublefactorial(d), d=convert(n, base, 10)) ; end if; end proc:`
	CROSSREFS	`Cf. A061602, A006882.` `Sequence in context: A148010 A148011 A148012 * A006882 A080498 A148013` `Adjacent sequences: A161175 A161176 A161177 * A161179 A161180 A161181`
	KEYWORD	`easy,nonn,base`
	AUTHOR	`Paolo P. Lava & Giorgio Balzarotti (paoloplava(AT)gmail.com), Jun 05 2009`

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Last modified February 16 16:45 EST 2012. Contains 205938 sequences.