-1127

Appears in sequences

• a(n) = (n+1)*(2-n)/2.at n=48A080956
• Row sums of number triangle related to the Jacobsthal numbers.at n=24A110325
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 193", based on the 5-celled von Neumann neighborhood.at n=21A270688
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 433", based on the 5-celled von Neumann neighborhood.at n=23A272148
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 449", based on the 5-celled von Neumann neighborhood.at n=21A272255
• a(n) = 1*2 - 3*4 + 5*6 - 7*8 + 9*10 - 11*12 + 13*14 - ... + (up to n).at n=48A319373
• Expansion of e.g.f. Product_{k>=1} (1 + x^prime(k))^(1/prime(k)).at n=8A352003