1008910

Appears in sequences

• Triangular numbers that are 1/6 of another triangular number.at n=7A077289
• Triangular numbers whose digit reversal is a brilliant number (A078972).at n=21A115678
• Number of 0..5 integer arrays v[1..n] of length n with all autocorrelation values sum(i){v[i]*v[i-k]} distinct for k in 0..n-1.at n=7A171311
• Number of 0..n-1 integer arrays v[1..8] of length 8 with all autocorrelation values sum(i){v[i]*v[i-k]} distinct for k in 0..7.at n=5A171359
• Positive triangular numbers (A000217) that are pentagonal numbers (A000326) divided by 2.at n=3A259156