32610

Appears in sequences

• a(n) counts the distinct cubical (on alphabet of 3 symbols) billiard words with length n, acting as prefix to just k = 2 such words of length n+1 (that is, a subset of "special").at n=19A180438
• Squarefree numbers n such that n^2 + 1 and n^2 - 1 are semiprime.at n=37A268697
• Index of first occurrence of n appearing twice in succession in van Eck's sequence (A181391), or 0 if it never occurs.at n=27A308782