-2877

Appears in sequences

• Triangle read by rows: row n gives coefficients C(n,j) for a Sheffer sequence (binomial-type) with lowering operator (D-1)/2 + T{ (1/2) * exp[(D-1)/2] } where T(x) is Cayley's Tree function.at n=50A135494
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 145", based on the 5-celled von Neumann neighborhood.at n=31A270289
• Expansion of the series 1/e(-q), where the series e(q) is Morier-Genoud and Ovsienko's q-analog of the real number e = exp(1).at n=22A392021