A124060 T totaler sequence. Number of t's in the American spelling of numbers.
0, 0, 1, 1, 0, 0, 0, 0, 1, 0, 1, 0, 1, 2, 1, 1, 1, 1, 1, 1, 2, 2, 3, 3, 2, 2, 2, 2, 3, 2, 2, 2, 3, 3, 2, 2, 2, 2, 3, 2, 1, 1, 2, 2, 1, 1, 1, 1, 2, 1, 1, 1, 2, 2, 1, 1, 1, 1, 2, 1, 1, 1, 2, 2, 1, 1, 1, 1, 2, 1, 1, 1, 2, 2, 1, 1, 1, 1, 2, 1, 1, 1, 2, 2, 1, 1, 1
Offset: 0
Examples
The words "zero" and "one" have no t's, so a(0) = a(1) = 0. The words "two" and "three" each have one t, so a(2) = a(3) = 1.
Links
- Michael S. Branicky, Table of n, a(n) for n = 0..10000
Programs
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PARI
total(n) = { local(a,i,j,sumt); a=["zero","one","two","three","four","five","six","seven","eight","nine","ten", "eleven","twelve","thirteen","fourteen","fifteen","sixteen","seventeen", "eghteen","nineteen","twenty","twentyone","twentytwo","twentythree", "twentyfour","twentyfive","twentysix","twentyseven","twentyeight","twentynine", "thirty","thirtyone","thirtytwo","thirtythree","thirtyfour","thirtyfive", "thirtysix","thirtyseven","thirtyeight","thirtynine","forty","fortyone", "fortytwo","fortythree","fortyfour","fortyfive","fortysix","fortyseven", "fortyeight","fortynine","fifty"]; for(i = 1,n, sumt=0; for(j=1,length(a[i]), if(mid(a[i],j,1)=="t",sumt++) ); print1(sumt, ", ") ) } \\ Get a substring of length n from string str starting at position s in str. mid(str,s,n) = { local(v,ln,x,tmp); v =""; tmp = Vec(str); ln=length(tmp); for(x=s,s+n-1, v=concat(v,tmp[x]); ); return(v) } -
Python
from num2words import num2words def a(n): return num2words(n).count('t') print([a(n) for n in range(87)]) # Michael S. Branicky, Nov 25 2021
Extensions
Offset corrected by Jon E. Schoenfield, Nov 23 2021
a(51) and beyond from Michael S. Branicky, Nov 25 2021