A321235 Haiku numbers.

77777, 101777, 102777, 103777, 104777, 105777, 106777, 107177, 107277, 107377, 107477, 107577, 107677, 107727, 107737, 107747, 107757, 107767, 107771, 107772, 107773, 107774, 107775, 107776, 107778, 107779, 107787, 107797, 107877, 107977

Offset

1,1

Comments

These numbers are haiku when written in English (including the 'and' between the hundreds and tens or units). A haiku is a three-line poem with 5 syllables in the first line, seven in the second and five in the third.

Apparently the actual criterion is that there are 17 syllables, as words can be broken across lines: e.g.,

One hundred and sev-

en thousand one hundred and

seventy-seven. - Robert Israel, Nov 11 2018

Links

Robert Israel, Table of n, a(n) for n = 1..10000

Example

77777 is a haiku:
Seventy-seven
thousand, seven hundred and
seventy-seven.

Maple

filter:= proc(n) uses StringTools; local t;
t:= convert(n, english, 'And');
t:= subs("ninety"="eighty", Split(t, "- "));
# Maple thinks "ninety" has 3 syllables
convert(map(SyllableLength, t), `+`)=17
end proc:
select(filter, [$1..110000]); # Robert Israel, Nov 11 2018

Crossrefs

Sequence in context: A133971 A133973 A133974 * A266967 A061528 A210141

Adjacent sequences: A321232 A321233 A321234 * A321236 A321237 A321238

Keyword

nonn,word,base,fini

Author

Matthew Scroggs, Nov 01 2018

Status

approved