A000555Number of labeled trees of diameter 4 with n nodes.

60, 720, 6090, 47040, 363384, 2913120, 24560910, 218386080, 2044958916, 20112075984, 207161237010, 2228884869120, 24989300398320, 291322535242176, 3524580157816854, 44176838981652000, …

The first 2 terms appear at position 193,785.

…08715608776658858910608960720874715826970169056266871…
position 193,785
termsstringfirst positionoccurrences
16012710,002,175
260720193,7859,913
3607206090not within 1,000,000,0000

Searched the first 1,000,000,000 digits. Strings longer than 12 digits are not indexed.