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A191784 Number of e's in the English name of the n-th odd number. 1
1, 2, 1, 2, 1, 3, 2, 2, 4, 3, 2, 3, 2, 3, 2, 1, 2, 1, 2, 1, 1, 2, 1, 2, 1, 1, 2, 1, 2, 1, 1, 2, 1, 2, 1, 3, 4, 3, 4, 3, 2, 3, 2, 3, 2, 2, 3, 2, 3, 2, 3, 4, 3, 4, 3, 5, 4, 4, 6, 5, 4, 5, 4, 5, 4, 3, 4, 3, 4, 3, 3, 4, 3, 4, 3, 3, 4, 3, 4, 3, 3, 4, 3, 4, 3, 5, 6, 5, 6, 5, 4, 5, 4, 5, 4, 4, 5, 4, 5, 4, 2, 3, 2, 3, 2 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Every odd number has the letter e in its English name, so a(n) can never be 0.
LINKS
EXAMPLE
a(5) = 1, because the 5th odd number is "nine", which contains one "e".
MAPLE
units:=[1, 0, 2, 0, 1, 0, 2, 1, 1, 1, 3, 2, 2, 2, 2, 2, 4, 3, 3]:tens:=[0, 0, 1, 0, 0, 0, 0, 2, 1, 1]: A191784 := proc(n) global tens, units: if(n<=10)then return units[2*n-1]: elif(n<=50)then return units[2*((n-1) mod 5) + 1] + tens[floor((n-1)/5)+1]: elif(n<=500)then return 1+units[floor((n-1)/50)]+procname(((n-1) mod 50) + 1): fi: return units[floor((n-1)/500)]+procname(((n-1) mod 500) + 1): end: seq(A191784(n), n=1..105); # valid up to n=5000, Nathaniel Johnston, Jun 26 2011
CROSSREFS
Cf. A085513.
Sequence in context: A077807 A280152 A281574 * A261350 A259177 A304036
KEYWORD
dumb,easy,nonn,word
AUTHOR
Kausthub Gudipati, Jun 25 2011
STATUS
approved

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Last modified May 23 07:28 EDT 2024. Contains 372760 sequences. (Running on oeis4.)