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Take any three consecutive terms and write them down (in English): their letters sum up to a square number. This is the slowest strictly increasing such sequence.
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%I #2 Mar 31 2012 13:46:51

%S 1,2,6,10,24,73,104,200,300,401,473

%N Take any three consecutive terms and write them down (in English): their letters sum up to a square number. This is the slowest strictly increasing such sequence.

%C Numbers without "and" are used here. Starting with "0,1" would give another sequence.

%e 1 2 6 = "one+two+six" = 9 letters; 9 is 3^2.

%e 300 401 473 = "three hundred + four hundred one + four hundred seventy three" = 49 letters; 49 is 7^2.

%K base,easy,nonn,word

%O 1,2

%A _Eric Angelini_, Mar 07 2005