67872

Appears in sequences

• Number of primitive (aperiodic) step shifted (decimated) sequence structures using a maximum of two different symbols.at n=19A056401
• Number of primitive (aperiodic) step shifted (decimated) sequence structures using exactly two different symbols.at n=19A056406
• Numbers k for which 6k+1, 24k+5, 432k^2+72k-1, and 432k^2+90k-1 are all prime.at n=53A175513
• Irregular triangle read by rows: row n consists of the coefficients of the expansion of the polynomial (2*x + 2)^n + (x^2 - 1)*(x + 2)^n.at n=68A300184