135744

Appears in sequences

• Number of primitive (aperiodic) step shifted (decimated) sequences using a maximum of two different symbols.at n=19A056381
• Number of primitive (aperiodic) step shifted (decimated) sequences using exactly two different symbols.at n=19A056386
• Triangle read by rows: T2[n,k] = Sum_{partitions of n with k parts p(n, k; m_1, m_2, m_3, ..., m_n)} c(n; m_1, m_2, ..., m_n) * x_1^m_1 * x_2^m_2 * ... x^n*m_n, where x_i = i-th prime.at n=42A145520